CN103551118B - Column [5] aromatic bonding silica gel stationary phase as well as preparation method and application thereof - Google Patents

Column [5] aromatic bonding silica gel stationary phase as well as preparation method and application thereof Download PDF

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CN103551118B
CN103551118B CN201310549876.7A CN201310549876A CN103551118B CN 103551118 B CN103551118 B CN 103551118B CN 201310549876 A CN201310549876 A CN 201310549876A CN 103551118 B CN103551118 B CN 103551118B
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silica gel
aromatic hydrocarbons
post
stationary phase
preparation
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CN103551118A (en
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张书胜
赵文杰
胡晨晨
楚建祥
冶保献
吴养洁
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Zhengzhou University
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Zhengzhou University
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Abstract

The invention belongs to the technical field of chromatographic separation, and particularly relates to a column [5] aromatic bonding silica gel stationary phase, and a preparation method and application thereof. The column [5] aromatic bonding silica gel stationary phase disclosed by the invention has the characteristics of high bonding amount, stable bonding layer and low cost, and is simple and convenient to prepare.

Description

A kind of post [5] aromatic hydrocarbons bonded silica gel stationary phase and preparation method thereof and application
Technical field
The invention belongs to technical field of chromatography separation, particularly a kind of post [5] aromatic hydrocarbons bonded silica gel stationary phase and preparation method thereof and application.
Background technology
Chromatogram is a kind of isolation technics be most widely used now, and its principle is that the component differential caused by difference of the intermolecular forces of different component and Stationary liquid or mobile phase moves.Chromatographic stationary phases is chromatographic isolation " heart ", and liquid chromatogram has polytype, comprises reverse-phase chromatography (RPLC), normal-phase chromatography (NPLC), HC (HIC), ion-exchange chromatography (IEC) etc.For the Stationary liquid that these are traditional, its separating mechanism and pattern single, as reverse-phase chromatography C18 Stationary liquid mainly relies on hydrophobic effect to be separated apolar substance, ion-exchange chromatography is by ion exchange isolating ions type compound.In the face of the natural products as complicated in character, composition of complex sample, Food and environment sample is multi-component is separated simultaneously, these traditional Stationary liquid have suffered from very large challenge, a lot of component cannot be separated completely, and this certainly will affect the accurate quantitative analysis of component.Mixed mode chromatogram (Mixed-mode chromatography, MMC) Stationary liquid comprises two or more functional group, different type of separation can be obtained only by the character and composition that change mobile phase, be conducive to improving separation selectivity and expanding range of application.Compared with traditional single-mode Stationary liquid, mixed mode Stationary liquid has the advantages such as high selectivity, high power capacity, Gao Zhuxiao.Along with the development of supramolecular chemistry, post aromatic hydrocarbons is synthesized as the macrocycle molecule that a class is new, and post aromatic hydrocarbons is connected by the contraposition of methylene bridge at phenyl ring by hydroquinones or Hydroquinone ether, and knot forms a columned class cyclic oligomer.Due to chemistry and the space structure of its uniqueness, post arene compounds combines characteristic and the advantage of multiple existing host compound: post aromatic hydrocarbons has the space structure of high degree of symmetry, and it can modify the guest molecule that just can identify ad hoc structure without complexity; The easy decorating sites such as hydroxyl are contained in post aromatic hydrocarbons bridging benzene ring structure both sides, make its chemical modification method be similar to cyclodextrin; In addition, post aromatic hydrocarbons also has special dissolution properties, effectively can carry out Host-guest Recognition in organic solvent.Post aromatic hydrocarbons shows excellent molecular recognition performance, it not only can identify electron acceptors such as purpurine, pyridiniujm, quaternary ammonium salt and ionic liquids as electron donor, also can and neutral diimidazole alkane guest molecule between interact form stable host-guest complex by multiple C-H π; From molecular structure, post aromatic hydrocarbons has the action site of potential chromatographic stationary phases, as aromatic ring (hydrophobic effect and π-π act on), phenolic hydroxyl group (hydrogen bond action, dipole-dipole effect), large annulated column chamber (Inclusion property) etc., predictably, if be applied to Stationary Phase of HPLC using post aromatic hydrocarbons as separating medium, to the chromatographic stationary phases of the novel high selectivity of exploitation one class, the research contents enriching supramolecular chemistry chromatographic stationary phases has important theory significance and using value.
Summary of the invention
The object of this invention is to provide a kind of post [5] aromatic hydrocarbons bonded silica gel stationary phase; This Stationary liquid not only has traditional ODS reverse-phase chromatography performance, can provide multiple action sites such as containing complexing, hydrogen bond action, π-π effect and spatial match simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of post [5] aromatic hydrocarbons bonded silica gel stationary phase, described Stationary liquid structure is such as formula shown in I:
Formula I.
The invention discloses the post aromatic hydrocarbons bonded silica gel stationary phase that a kind of bonded amount is high, bonded layer is stable.It not only has traditional ODS reverse-phase chromatography performance, multiple action sites such as containing complexing, hydrogen bond action, π-π effect and spatial match can be provided simultaneously, thus to a certain extent can substitute-ODS, the material of also difficult separation simultaneously provides the possibility of separation.
The present invention still further provides the preparation method of described post [5] aromatic hydrocarbons bonded silica gel stationary phase, reduce pressure after formula II compounds acetic acid pilum [5] aromatic hydrocarbons and thionyl chloride are refluxed and extract thionyl chloride and obtain post [5] aromatic hydrocarbons that the acyl chlorides shown in formula III activates, then namely obtain described post [5] aromatic hydrocarbons bonded silica gel stationary phase with the separation and purification in 20-24 hour of inorganic matrix filler room temperature reaction;
Formula II formula III.
Its preparation process can be expressed as:
On described post [5] aroamtic hydrocarbon raw material, lower edge contains acetate.
Described inorganic matrix filler is aminopropyl triethoxysilane SiClx glue.
Aminopropyl triethoxysilane SiClx glue is diameter 5 μm, and specific area is 250-300m 2the spherical silica gel of/g.
The volume that 1g formula II compound adds thionyl chloride is 15-20ml.
Formula III compound and inorganic matrix filler react in organic solvent, formula II compound (g): aminopropyl triethoxysilane SiClx glue (g): organic solvent (mL) is preferably 1:3-4:40-70.
Organic solvent can be carrene, chloroform, oxolane etc.
Described separation and purification is: reaction is filtered after stopping, and filter cake uses DMF, water, methyl alcohol, washed with dichloromethane successively, vacuum drying 12-24 h at 60-100 DEG C.
The liquid chromatogram that described post [5] aromatic hydrocarbons bonded silica gel stationary phase can be used for organic compound is separated.
Usually only the ratio of methyl alcohol and water in mobile phase need be regulated just to meet the compartment analysis requirement of sample.
Compared with prior art, tool has the following advantages in the present invention:
It is higher that post of the present invention [5] aromatic hydrocarbons bonded silica gel stationary phase has bonded amount, and bonded layer is stablized, and preparation method is easy, lower-cost feature.
Accompanying drawing explanation
Fig. 1 is the chromatographic fractionation figure of Polycyclic Aromatic Hydrocarbon Mixture sample on Stationary liquid of the present invention, and peak that wherein each material is corresponding is number as follows: benzene (1), naphthalene (2), and anthracene (3), bends (4) , perylenes (5); Mobile phase is methyl alcohol: water=60:40(volume ratio, lower same), determined wavelength is 254 nm, and flow rate of mobile phase is 1 mL/min.
Fig. 2 is aniline and the chromatographic fractionation figure of phenylenediamine position different structure mixture on Stationary liquid of the present invention, and peak that wherein each material is corresponding is number as follows: ortho-aminotoluene (1), 2,6-dimethylaniline (2), naphthylamines (3), paranitroanilinum (4); Mobile phase is methyl alcohol: water=55:45, and determined wavelength is 254 nm, and flow rate of mobile phase is 1 mL/min.
Fig. 3 is the chromatographic fractionation figure of substituted benzene on Stationary liquid of the present invention, and peak that wherein each material is corresponding is number as follows: toluene (1), ethylbenzene (2), n-proplbenzene (3), n-butyl benzene (4), positive penta benzene (5); Mobile phase is methyl alcohol: water=75:25, and determined wavelength is 254 nm, and flow rate of mobile phase is 1 mL/min.
Detailed description of the invention
With specific embodiment, technical scheme of the present invention is described below, but protection scope of the present invention is not limited thereto:
Embodiment 1
Post [5] aromatic hydrocarbons bonded silica gel stationary phase, is obtained by following step:
1) activated silica gel: take a certain amount of Bio-sil and immerse HCl/H 2in O (1:3, v/v), silica gel weight (g) and hydrochloric acid volume (ml) are than being 1:15-1:20; Soak 12 h, the 24-36 h that refluxes under magnetic stirring removes metal ion, then filter with the sand core funnel of G5, repeatedly rinse to neutrality with secondary redistilled water, finally wash twice with acetone, at 160 DEG C, dry 10 h are to slough surface solvent and water, namely obtain the activated silica gel of surface uniform distribution hydroxyl, are stored in drier for subsequent use.
2) preparation of aminopropyl triethoxysilane SiClx glue (also can adopt commercial goods): N is being housed 2ingress pipe, condenser pipe, CaCl 2in the drying device of drying tube and magnetic agitation, add a certain amount of aminopropyl triethoxysilane, add dry toluene again, (20 r/min) adds activated silica gel, silica gel weight (g) under magnetic stirring at a slow speed: aminopropyl triethoxysilane (ml): dry toluene (ml) is generally: 3-5: 5:45.Rapid temperature increases to 110 DEG C-130 DEG C, and accelerate mixing speed, at N 2lower backflow 24 h of protection.Stop reaction, filter with the sand core funnel of G5, repeatedly with methyl alcohol, secondary redistilled water, acetone washing, vacuum drying 10 h at 70 DEG C, namely obtains aminopropyl triethoxysilane SiClx glue and is stored in drier for subsequent use.
3) N is being housed 2ingress pipe, condenser pipe, CaCl 2in the drying device of drying tube and magnetic agitation, get 800mg carboxyl post [5] aromatic hydrocarbons and 15mL thionyl chloride adds 100mL flask, backflow 2h, decompression is steamed except excess thionyl chloride as far as possible, obtains white solid, and product is not purified can be used for next step reaction.Post [5] aromatic hydrocarbons activated by above-mentioned acyl chlorides is dissolved in 50mL anhydrous methylene chloride, add 3g aminopropyl triethoxysilane SiClx glue, after room temperature reaction 24h, add 10mL methyl alcohol and continue reaction 6h, with G5 sand core funnel suction filtration, use DMF successively, water, methyl alcohol, washed with dichloromethane, obtain Stationary liquid, 60 DEG C of vacuum drying.
Post [5] Arene Stationary Phase and the aminopropyl triethoxysilane SiClx glue results of elemental analyses of preparation of the present invention are as shown in table 1 below, wherein bonded amount calculates gained according to carbon element content, by the visible Stationary liquid of the present invention of table 1, there is higher bonded amount, can bonding 70umol post aromatic hydrocarbons above every gram of silica gel.In the scope of mobile phase pH=3-9, repeatedly alternately rinse four months chromatogram column efficiencies have dropped about 7%, the RSD(n=6 of aniline retention time change) < 2%, this shows under neutrality, weak acid and weak basic condition, the chemical property of post of the present invention [5] aromatic hydrocarbons bonded stationary phase is more stable, and the reappearance of chromatographic column is better.
Table 1
C% H% N% Bonded amount (umol/g)
Aminopropyl triethoxysilane SiClx glue 5.91 1.32 1.89
Post [5] Arene Stationary Phase 9.84 1.25 1.24 70
Adopt homogenate method, be homogenate with dioxane and carbon tetrachloride (volume ratio is 2:3), do displacement fluid with methyl alcohol, prepared Stationary liquid is loaded in stainless steel tube under 50MPa.
Application: Stationary liquid of the present invention can be separated for the liquid chromatogram of most of organic compound effectively, it not only has traditional ODS reverse-phase chromatography performance, multiple action sites such as containing complexing, hydrogen bond action, π-π effect and spatial match can be provided simultaneously, thus to a certain extent can substitute-ODS, the material of also difficult separation simultaneously provides the possibility of separation.Fig. 1,2,3 is respectively Polycyclic Aromatic Hydrocarbon Mixture sample, aniline and phenylenediamine position different structure mixture, the chromatographic fractionation figure of substituted benzene on Stationary liquid of the present invention.

Claims (7)

1. post [5] aromatic hydrocarbons bonded silica gel stationary phase, is characterized in that, described Stationary liquid structure is such as formula shown in I:
Formula I.
2. the preparation method of post described in claim 1 [5] aromatic hydrocarbons bonded silica gel stationary phase, it is characterized in that, reduce pressure after formula II compounds acetic acid pilum [5] aromatic hydrocarbons and thionyl chloride are refluxed and extract thionyl chloride and obtain post [5] aromatic hydrocarbons that the acyl chlorides shown in formula III activates, then namely obtain described post [5] aromatic hydrocarbons bonded silica gel stationary phase with the separation and purification in 20-24 hour of inorganic matrix filler room temperature reaction; Described inorganic matrix filler is aminopropyl triethoxysilane SiClx glue;
Formula II formula III.
3. the preparation method of post [5] aromatic hydrocarbons bonded silica gel stationary phase as claimed in claim 2, it is characterized in that, aminopropyl triethoxysilane SiClx glue is specific area is 250-300m 2the spherical silica gel of/g.
4. the preparation method of post [5] aromatic hydrocarbons bonded silica gel stationary phase as claimed in claim 2, it is characterized in that, the volume that 1g formula II compound adds thionyl chloride is 15-20ml.
5. the preparation method of post [5] aromatic hydrocarbons bonded silica gel stationary phase as claimed in claim 2, it is characterized in that, formula III compound and inorganic matrix filler react in organic solvent, formula II compound: aminopropyl triethoxysilane SiClx glue: organic solvent is 1g:3-4g:40-70ml.
6. the preparation method of post [5] aromatic hydrocarbons bonded silica gel stationary phase as claimed in claim 2, it is characterized in that, described separation and purification is: reaction is filtered after stopping, and filter cake uses DMF, water, methyl alcohol, washed with dichloromethane successively, vacuum drying 12-24 h at 60-100 DEG C.
7. post according to claim 1 [5] aromatic hydrocarbons bonded silica gel stationary phase is separated for the liquid chromatogram of organic compound.
CN201310549876.7A 2013-11-08 2013-11-08 Column [5] aromatic bonding silica gel stationary phase as well as preparation method and application thereof Expired - Fee Related CN103551118B (en)

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CN113181890B (en) * 2021-04-28 2022-09-16 中国科学院兰州化学物理研究所 Preparation and application of amino functionalized chiral column [5] arene chromatographic stationary phase
CN113578380B (en) * 2021-08-05 2022-07-22 抚顺东科新能源科技有限公司 Column [5] arene ionic liquid catalyst based on propylimidazole functionalization and preparation method thereof
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