CN116903874A - Preparation method of cucurbituril rare earth supermolecule hydrogel - Google Patents

Preparation method of cucurbituril rare earth supermolecule hydrogel Download PDF

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CN116903874A
CN116903874A CN202310888756.3A CN202310888756A CN116903874A CN 116903874 A CN116903874 A CN 116903874A CN 202310888756 A CN202310888756 A CN 202310888756A CN 116903874 A CN116903874 A CN 116903874A
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cucurbituril
rare earth
amino
hydrogel
disulfonic acid
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陈凯
施静
肖帅
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Nanjing University of Information Science and Technology
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Nanjing University of Information Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0065—Preparation of gels containing an organic phase
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
    • C08G83/008—Supramolecular polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
    • C08J3/075—Macromolecular gels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2387/00—Characterised by the use of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds

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  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

The invention discloses a preparation method of a cucurbituril rare earth supermolecular hydrogel, which belongs to the technical field of chemical synthesis and designs and synthesizes 13 supermolecular hydrogels with similar properties by utilizing the synergistic effect of 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt organic ligands and rare earth metal ions. The preparation method of the cucurbituril rare earth supermolecule hydrogel provided by the invention has the characteristics of simple operation, low energy consumption, short synthesis time and the like, and by using the organic ligand 3-amino 2, 7-naphthalene disulfonic acid monosodium salt, the ordered arrangement of five-membered cucurbituril is promoted, the system plays the dual roles of counter anion and bridging, and the amino in the ligand points to a straight-through pore canal, so that a large number of water molecules are connected in a one-dimensional pore canal through the hydrogen bond action between the water molecules and the amino on the 3-amino 2, 7-naphthalene disulfonic acid monosodium salt, and a final gel structure is formed. Due to the existence of non-covalent function connection, a foundation is laid for the application of the material in the aspects of stimulation response, self-healing capacity and the like.

Description

Preparation method of cucurbituril rare earth supermolecule hydrogel
Technical Field
The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of a cucurbituril rare earth supermolecule hydrogel.
Background
Various cucurbituril hydrogels are reported by various researchers at home and abroad on different open journals, and in the hydrogel materials, the synthetic method is complex or the synthetic period is long, so as to solve the problems, a preparation method of the cucurbituril rare earth supermolecule hydrogel is provided
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of a cucurbituril rare earth supermolecule hydrogel.
The aim of the invention can be achieved by the following technical scheme:
the preparation method of the cucurbituril rare earth supermolecule hydrogel comprises the following steps:
five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and rare earth metal salt are mixed according to the mole ratio of 1: 1-2: 8-10 of ingredients are respectively weighed;
respectively adding water into five-membered melon ring or cucurbituril [5] and rare earth metal salt to obtain five-membered melon ring or cucurbituril [5] solution and rare earth metal salt solution, heating and stirring;
adding water into 3-amino 2, 7-naphthalene disulfonic acid monosodium salt and stirring to obtain 3-amino 2, 7-naphthalene disulfonic acid monosodium solution;
mixing the three solutions, and standing to obtain the hydrogel.
Further, the solution is heated and stirred in the preparation process, the heating temperature is 50-80 ℃, and the solution is prepared into 10 mg.mL -1 Five-membered cucurbituril or cucurbituril [5]]Solution and 0.1 mol.L -1 Is a rare earth metal solution.
Further, the rare earth metal salt is a hydrochloride or nitrate of rare earth metal.
Further, the 3-amino-2, 7-naphthalene disulfonic acid monosodium solution is 3.6 mg.mL -1 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt solution.
Furthermore, all the solutions must be clear and transparent before the three solutions are mixed, uniformly mixed at normal temperature and kept stand for 0.5-10min.
The invention has the beneficial effects that:
the invention discloses a preparation method of a cucurbituril rare earth supermolecule hydrogel, which utilizes the synergistic effect of 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt organic ligand and rare earth metal ions to design and synthesize 13 supermolecule hydrogels with similar properties (as shown in figure 1);
the preparation method provided by the invention has the characteristics of simple operation, low energy consumption, short synthesis time and the like, and by using the organic ligand 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt (ANDSO), the ordered arrangement of five-membered melon rings is promoted, the system plays the dual roles of counter anion and bridging, and the amino group in the ligand points to a straight-through pore canal, so that a large number of water molecules are connected in a one-dimensional pore canal through the hydrogen bond action between the amino group and the amino group on the 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt, and a final gel structure is formed (figure 2);
in the whole structure, the amino groups in the ANDSO ligand point to the through-channels, so that a large number of water molecules are connected in the one-dimensional channels through hydrogen bonding with the amino groups on the ANDSO, and the non-covalent effects promote the formation of hydrogel. In addition, the existence of the non-covalent effect lays a foundation for the application of the material in the aspects of stimulation response, self-healing capacity and the like (figures 3-9).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a photograph of a class of melon-based rare earth supramolecular hydrogels of the present invention under a fluorescent lamp;
FIG. 2 is a crystal structure diagram of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention;
FIG. 3 is an infrared spectrum of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention;
FIG. 4 is a graph showing fluorescence spectra before and after repair of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention;
FIG. 5 is an SEM image of the lyophilized (left) and crystalline (right) guar-based rare earth supramolecular hydrogels obtained in example 3 of the present invention;
FIG. 6 shows the results of stimulus response of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention at different temperatures, the gel being broken at 90 ℃;
FIG. 7 shows the results of stimulus response of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention after dropwise addition of various anions, and the gel was destroyed after addition of a part of anions;
FIG. 8 is a graph showing the results of stimulus response of a guar-based rare earth supramolecular hydrogel obtained in example 3 of the present invention after dropping various cations, and the gel was broken after adding a part of the cations;
FIG. 9 is a graph showing that the gel of the melon-based rare earth supramolecular hydrogel obtained in example 3 was destroyed after adding a part of organic solvent according to the stimulus response result after dropping various organic solvents;
FIG. 10 is a structural formula of five-membered melon rings (right) and 3, -amino 2, 7-naphthalenedisulfonic acid monosodium salt (ANDSO) (left) according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The preparation method of the cucurbituril rare earth supermolecular hydrogel comprises the steps of preparing five-membered cucurbituril (right) and 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt (ANDSO) (left) with structural formulas shown in figure 10.
Example 1: preparation of cucurbituril rare earth supermolecular hydrogel (five-membered cucurbituril or cucurbituril [5] -ANDSO-Ce3+)
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and cerium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and cerium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 2: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Pr 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and praseodymium nitrate are mixed according to a molar ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and praseodymium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 3: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Nd 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and neodymium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and neodymium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 4: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Sm 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and samarium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and samarium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 5: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Eu 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and europium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and europium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 6: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Gd 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and gadolinium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and gadolinium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 7: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Tb 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and terbium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and terbium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 8: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Dy 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and dysprosium nitrate are mixed according to a mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and dysprosium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 9: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Ho 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and holmium nitrate are mixed according to a molar ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and holmium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 10: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Er 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and erbium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and erbium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 11: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Tm 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and thulium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and thulium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 12: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Yb 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and ytterbium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing the obtained five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and ytterbium nitrate, heating with a proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
Example 13: melon-based rare earth supermolecular hydrogel (five-membered melon ring or cucurbituril [5]]-ANDSO-Lu 3+ ) Is prepared from
Five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and lutetium nitrate are mixed according to the mol ratio of 1: 1-2: 8-10 of ingredients are respectively weighed; weighing five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and lutetium nitrate, heating with proper amount of water, and stirring with strong magnetic force; and after all three are changed into clear and transparent solution, the solution is quickly and uniformly mixed at normal temperature, and the solution is stood for one minute, so that the cucurbituril rare earth supermolecule hydrogel can be obtained.
The invention has the characteristics of simple operation, low energy consumption, less time consumption and the like, not only promotes the ordered arrangement of five-membered cucurbiturils by using the organic ligand 3-amino 2, 7-naphthalene disulfonic acid monosodium salt, but also plays a double role of counter anion and bridging in the system, and the amino group in the ligand points to a straight-through pore canal, so that a large amount of water molecules are connected in a one-dimensional pore canal through the hydrogen bonding action between the amino group and the amino group on the 3-amino 2, 7-naphthalene disulfonic acid monosodium salt, and a final gel structure is formed. Due to the existence of non-covalent function connection, a foundation is laid for the application of the material in the aspects of stimulation response, self-healing capacity and the like.
FIG. 2 is a schematic representation of a melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) Wherein (a) five-membered melon ring-Nd 3+ A one-dimensional supramolecular chain; (b) Self-induction between the five-membered melon rings on one-dimensional supermolecular chain and the five-membered melon rings on adjacent one-dimensional supermolecular chain; (c) One-dimensional supermolecular chain through self-inductionA two-dimensional planar structure formed by guiding; (d) Weak interactions between five-membered cucurbituril molecules and ANDSO ligands; (e) A three-dimensional melon ring base rare earth supermolecular structure with a one-dimensional pore canal.
FIG. 3 is a schematic representation of a melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) Is (2626 cm in ANDSO ligand) -1 The characteristic functional group of-OH in the sulfonic acid group was observed to vibrate while almost annihilating in the gel; also at Q5]2940cm in infrared spectrum of (2) -1 And 3000cm -1 It was observed that the bridging methylene groups of the melon rings and the methylene-specific functional groups of the equatorial plane vibrate, whereas the strength in the gel is reduced. It is demonstrated that there is some hydrogen bonding or C-H … pi between the sulfonic acid groups in the ANDSO ligand and the outer wall of the cucurbituril, promoting the generation of the final gel network. )
FIG. 4 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) Fluorescence spectra before and after repair. (under severe shaking, the sol is converted from gel to sol, and the sol is heated and boiled to be clear and cooled and then returns to the gel state, so that the fluorescence intensity after repair is basically unchanged or even higher, indicating that the hydrogel has strong repair performance.)
FIG. 5 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) SEM images of lyophilized (left) and crystals (right)
FIG. 6 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) At 90℃the gel is broken (at a high temperature of 90℃the phase state of the gel changes, starting to change from gel to sol, but the fluorescence intensity does not substantially change. The gel can bear the high temperature below 90 ℃ and has good thermal stability. ).
FIG. 7 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) The gel is destroyed after adding part of anions (under certain conditions, the quintuple ring solution has aggregation-induced emission (AIE), so that when the anions are introduced, the anions react with the outer wall of the quintuple ring to change the hydrogen bond network in the gel, and finally the gel phase state changes).
FIG. 8 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) Gel is destroyed after adding part of cation (the introduction of the above metal ions may affect Nd 3+ Or directly participate in coordination, resulting in a change in gel phase state, wherein Sr 2+ 、Ba 2+ 、Pb 2+ Promoting the enhancement of gel fluorescence intensity).
FIG. 9 melon-based rare earth supramolecular hydrogel of example 3 (Nd 3+ ) The gel was destroyed after addition of a portion of the organic solvent (benzene and aniline can cause quenching of the fluorescence intensity of the gel, while acetonitrile and n-hexane have substantially no effect on the fluorescence intensity)
Table 1 shows a guar-based rare earth supramolecular hydrogel (Nd 3+ ) Crystal structure parameter table
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.

Claims (7)

1. The preparation method of the cucurbituril rare earth supermolecule hydrogel is characterized by comprising the following steps:
five-membered cucurbituril or cucurbituril [5], 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt and rare earth metal salt are mixed according to the mole ratio of 1: 1-2: 8-10 of ingredients are respectively weighed;
respectively adding water into five-membered melon ring or cucurbituril [5] and rare earth metal salt to obtain five-membered melon ring or cucurbituril [5] solution and rare earth metal salt solution, heating and stirring;
adding water into 3-amino 2, 7-naphthalene disulfonic acid monosodium salt and stirring to obtain 3-amino 2, 7-naphthalene disulfonic acid monosodium solution;
mixing the three solutions, and standing to obtain the hydrogel.
2. The method for preparing the cucurbituril rare earth supermolecular hydrogel according to claim 1, wherein the heating and stirring are carried out in the solution preparation process, the heating temperature is 50-80 ℃, and the cucurbituril rare earth supermolecular hydrogel is prepared into 10 mg/mL -1 Five-membered cucurbituril or cucurbituril [5]]Solution and 0.1 mol.L -1 Is a rare earth metal salt solution.
3. The method for preparing a cucurbituril rare earth supermolecular hydrogel according to claim 1, wherein the rare earth metal salt is a hydrochloride or nitrate of rare earth metal.
4. The method for preparing a guar group rare earth supermolecule hydrogel according to claim 1, wherein the 3, -amino 2, 7-naphthalene disulfonic acid monosodium solution is 3.6 mg.ml -1 3, -amino 2, 7-naphthalene disulfonic acid monosodium salt solution.
5. The method for preparing the cucurbituril rare earth supermolecular hydrogel according to claim 1, wherein all the three solutions are clear and transparent before being mixed, uniformly mixed at normal temperature and kept stand for 0.5-10min.
6. A hydrogel made by the method of any one of claims 1-5.
7. Use of the method according to any one of claims 1-5 for the preparation of a guar-based rare earth supramolecular hydrogel.
CN202310888756.3A 2023-07-19 2023-07-19 Preparation method of cucurbituril rare earth supermolecule hydrogel Pending CN116903874A (en)

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