CN110015990A - 一种钴配位化合物及其制备方法与应用 - Google Patents
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- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 55
- 239000010941 cobalt Substances 0.000 title claims abstract description 55
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 150000001875 compounds Chemical class 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000002904 solvent Substances 0.000 claims abstract description 21
- YCYBZKSMUPTWEE-UHFFFAOYSA-L cobalt(ii) fluoride Chemical compound F[Co]F YCYBZKSMUPTWEE-UHFFFAOYSA-L 0.000 claims abstract description 17
- MPFLRYZEEAQMLQ-UHFFFAOYSA-N dinicotinic acid Chemical compound OC(=O)C1=CN=CC(C(O)=O)=C1 MPFLRYZEEAQMLQ-UHFFFAOYSA-N 0.000 claims abstract description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 244000061458 Solanum melongena Species 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 229910001429 cobalt ion Inorganic materials 0.000 claims abstract description 8
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000003446 ligand Substances 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 3
- ZHUXMBYIONRQQX-UHFFFAOYSA-N hydroxidodioxidocarbon(.) Chemical group [O]C(O)=O ZHUXMBYIONRQQX-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 3
- CLWRFNUKIFTVHQ-UHFFFAOYSA-N [N].C1=CC=NC=C1 Chemical group [N].C1=CC=NC=C1 CLWRFNUKIFTVHQ-UHFFFAOYSA-N 0.000 claims abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 50
- 235000019441 ethanol Nutrition 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 4
- GJAWHXHKYYXBSV-UHFFFAOYSA-N pyridinedicarboxylic acid Natural products OC(=O)C1=CC=CN=C1C(O)=O GJAWHXHKYYXBSV-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- -1 compound Carboxylic acid Chemical class 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000012046 mixed solvent Substances 0.000 claims 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims 1
- 229910021582 Cobalt(II) fluoride Inorganic materials 0.000 abstract description 10
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- XXLDWSKFRBJLMX-UHFFFAOYSA-N carbon dioxide;carbon monoxide Chemical compound O=[C].O=C=O XXLDWSKFRBJLMX-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910002090 carbon oxide Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- DLGYNVMUCSTYDQ-UHFFFAOYSA-N azane;pyridine Chemical compound N.C1=CC=NC=C1 DLGYNVMUCSTYDQ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
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- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
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- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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Abstract
本发明公开了一种钴配位化合物,由3,5‑吡啶二羧酸与氟化钴CoF2在溶剂热条件下合成得到,所得钴配位化合物的分子式为(C14H14Co2N2O12)n,其中Co为二价金属钴离子。所述钴配位化合物的形态为固态晶体。3,5‑吡啶二羧酸配体与钴离子通过羧基氧原子以及吡啶氮原子形成二维网状结构,并进一步通过氢键形成三维超分子结构。本发明还提供了该钴配位化合物的制备方法:将3,5‑吡啶二羧酸与氟化钴CoF2在溶剂热条件下合成得到紫红色透明的块状晶体。本发明制备简单,产物纯度和产率均较高,在光催化转化二氧化碳方面具有良好的应用前景,可作为一种光催化剂,把二氧化碳转变为一氧化碳。
Description
技术领域
本发明涉及配位化合物功能材料技术领域,更具体地,涉及一种钴配位化合物及其制备方法与应用。
背景技术
目前,由于全球范围内对化石燃料的大量使用,使得CO2的排放量大量增加,从而引起全球变暖等诸多环境问题。将CO2进行化学还原,使其转变成新的燃料,比如CO,可以极大的缓解CO2的排放所带来气候与环境问题。为了实现二氧化碳向一氧化碳的转化,一般使用可见光催化还原CO2。因此,探寻高效的光催化剂是整个转化反应的关键所在。传统二氧化碳还原的光催化剂一般是贵金属配合物,这些配合物使用Ru,Ir,Pt等贵金属原料,因此价格极其昂贵。但是,把廉价的钴配位化合物应用于光催化还原二氧化碳的研究目前还很少见诸报道。因此,制备新型的钴配位化合物作为光催化剂,并应用于二氧化碳的还原具有极大的潜在价值。3,5-吡啶二羧酸具有可供钴离子配位的多个配位点,这为合成结构新颖的钴配位化合物提供了极大的可能,更重要的是钴属于廉价金属,因此选择该类化合物作为光催化剂具有成本低廉的巨大优势。
发明内容
有鉴于此,本发明为克服现有技术的至少一种不足,提供一种价格低廉的金属配位化合物钴配位化合物,作为光催化剂应用于光催化还原二氧化碳。
为了解决上述存在的技术问题,本发明采用下述技术方案:
一种钴配位化合物,所述钴配位化合物由3,5-吡啶二羧酸与氟化钴(CoF2)在溶剂热条件下合成得到,所得钴配位化合物的分子结构式为(C14H14Co2N2O12)n,其中Co为二价金属钴离子。
所述钴配位化合物中3,5-吡啶二羧酸配体与钴离子通过羧基氧原子以及吡啶氮原子形成二维网状结构;还通过氢键形成三维超分子结构。
所述钴配位化合物的形态为固态晶体,所述晶体的结晶为单斜晶系,C2/c空间群;晶胞参数分别为:b=11.9828(14)、α=γ=90°,β=105.176(16)°,配位化合物的分解温度为405℃。
本发明还提供了一种制备上述钴配位化合物的方法,包括如下步骤:
S1.将3,5-吡啶二羧酸和氟化钴溶于溶剂中得到混合液;
S2.将步骤S1所得混合液密封后进行溶剂热反应,反应结束后度缓慢冷却到室温,得到紫红色透明的块状晶体;
S3.洗涤步骤S2所得紫红色透明块状晶体,自然晾干,即制得所述钴配位化合物的单晶样品。
进一步地,步骤S1中,所述3,5-吡啶二羧酸和氟化钴的摩尔比为3:1~1:1,优选地,3,5-吡啶二羧酸和氟化钴的摩尔比为2~1~1:1;所述溶剂为蒸馏水与乙醇的混合溶剂。
进一步地,步骤S2中,所述溶剂热反应在120~180℃进行,优选130~160℃;反应时间为36~72小时,优选40~60小时。
进一步地,步骤S2中,冷却的速度为每小时10℃。
进一步地,步骤S3中,用乙醇洗涤步骤S2所得紫红色透明块状晶体。
本发明还提供了一种上述钴配位化合物的应用,以所述钴配位化合物作为二氧化碳还原成一氧化碳的光催化剂。
本发明与现有技术相比较有如下有益效果:
首先,本发明利用了3,5-吡啶二羧酸具有的多个配位点的特点,达到与钴离子形成配位化合物的目的。
其次,本发明采用廉价金属钴为原料,降低了光催化剂的成本。
第三,本发明钴配位化合物作为光催化剂能有效地把二氧化碳还原为一氧化碳,避免使用昂贵的贵金属配位化合物作为催化剂。
第四,本发明钴配位化合物作为催化剂稳定性好。
本发明的制备方法上:采用溶剂热反应的方法,简单易行,而且产品纯度高。
附图说明
图1是钴配位化合物的晶体结构单元示意图。
图2是钴配位化合物的晶体堆积示意图。
图3是钴配位化合物作为光催化剂还原二氧化碳的产物的气相色谱检测图。该图表明在使用所述钴配位化合物为催化剂时,可以使二氧化碳还原为一氧化碳。
图4为钴配位化合物的热重图。该图表明该钴配位化合物具有良好的热稳定性。
具体实施方式
为了让本领域的技术人员更好地理解本发明的技术方案,下面结合附图对本发明作进一步阐述。
实施例1
将33.0mg(0.1mmol)3,5-吡啶二羧酸、9.7mg(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在130℃下进行溶剂热反应,反应60小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例2
将33.0mg(0.1mmol)3,5-吡啶二羧酸、9.7mg(0.10mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在140℃下进行溶剂热反应,反应40小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例3
将49.5mg(0.1mmol)3,5-吡啶二羧酸、9.7mg(0.10mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在150℃下进行溶剂热反应,反应50小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例4
将33.0mg(0.1mmol)3,5-吡啶二羧酸、9.7mg(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在160℃下进行溶剂热反应,反应48小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例5
将33.0mg(0.2mmol)3,5-吡啶二羧酸、9.7(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在150℃下进行溶剂热反应,反应50小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例6
将99.0mg(0.3mmol)3,5-吡啶二羧酸、9.7(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在150℃下进行溶剂热反应,反应50小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例7
将33.0mg(0.2mmol)3,5-吡啶二羧酸、9.7(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在120℃下进行溶剂热反应,反应50小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
实施例8
将33.0mg(0.2mmol)3,5-吡啶二羧酸、9.7(0.1mmol)氟化钴CoF2加入到5mL水中,然后加入5mL乙醇,并混合均匀。所得混合液密封后,在180℃下进行溶剂热反应,反应50小时之后,以每小时10℃的速度冷却到室温,得到紫红色块状透明晶体,用乙醇洗涤,自然晾干,则制得钴配位化合物的单晶样品。
测试方法:
将制得的钴配位化合物在Rigaku R-AXIS SPIDER衍射仪上完成单晶衍射测试,测试结果如图1~2所示;
将制得的钴配位化合物作为光催化剂应用于二氧化碳的还原反应,反应产物在SHIMADZU GC-2014C完成气相色谱检测,检测结果如图3所示;
将制得的钴配位化合物在STA449F31完成热重测试,测试结果如图4所示。
显然,本发明的上述实施例仅仅是为清楚地说明本发明所作的举例,而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明权利要求的保护范围之内。
Claims (10)
1.一种钴配位化合物,其特征在于,所述钴配位化合物由3,5-吡啶二羧酸与氟化钴在溶剂热条件下合成得到,所得钴配位化合物的分子结构式为(C14H14Co2N2O12)n,其中Co为二价金属钴离子。
2.根据权利要求1所述的钴配位化合物,其特征在于,所述钴配位化合物中3,5-吡啶二羧酸配体与钴离子通过羧基氧原子以及吡啶氮原子形成二维网状结构。
3.根据权利要求2所述的钴配位化合物,其特征在于,所述钴配位化合物还通过氢键形成三维超分子结构。
4.根据权利要求1所述的钴配位化合物,其特征在于,所述钴配位化合物的形态为固态晶体,所述晶体的结晶为单斜晶系,C2/c空间群;晶胞参数分别为:b=11.9828(14)、α=γ=90°,β=105.176(16)°,配位化合物的分解温度为405℃。
5.一种如权利要求1~4任一项所述钴配位化合物的制备方法,其特征在于,包括如下步骤:
S1.将3,5-吡啶二羧酸和氟化钴溶于溶剂中得到混合液;
S2.将步骤S1所得混合液密封后进行溶剂热反应,反应结束后度缓慢冷却到室温,得到紫红色透明的块状晶体;
S3.洗涤步骤S2所得紫红色透明块状晶体,自然晾干,即制得所述钴配位化合物的单晶样品。
6.根据权利要求5所述的制备方法,其特征在于,步骤S1中,所述3,5-吡啶二羧酸和氟化钴的摩尔比为3:1~1:1,所述溶剂为蒸馏水与乙醇的混合溶剂。
7.根据权利要求5所述的制备方法,其特征在于,步骤S2中,所述溶剂热反应在120~180℃进行,反应时间为36~72小时。
8.根据权利要求5所述的制备方法,其特征在于,步骤S2中,冷却的速度为每小时10℃。
9.根据权利要求5所述的制备方法,其特征在于,步骤S3中,用乙醇洗涤步骤S2所得紫红色透明块状晶体。
10.一种如权利要求1~4任一项所述钴配位化合物的应用,其特征在于,以所述钴配位化合物作为二氧化碳还原成一氧化碳的光催化剂。
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