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Two Novel Hydrogen-Bonded Metal–Organic Frameworks: Dual Functions for Reversible Hydrochromism and Electrocatalytic Hydrogen Evolution Reaction
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-09-11 , DOI: 10.1021/acs.cgd.3c00716 Hua Liu 1 , He-Juan Li 1 , Zhi-Wei Zheng 1 , Bo-Yi Fu 1 , Xiang-Yu Zhang 1, 2 , Kun Huang 1 , Da-Bin Qin 1 , Bin Zhao 1, 2
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-09-11 , DOI: 10.1021/acs.cgd.3c00716 Hua Liu 1 , He-Juan Li 1 , Zhi-Wei Zheng 1 , Bo-Yi Fu 1 , Xiang-Yu Zhang 1, 2 , Kun Huang 1 , Da-Bin Qin 1 , Bin Zhao 1, 2
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Metal–organic frameworks (MOFs) with versatile functions are attractive in broad fields based on unique structures and properties. Here, two isomorphic MOFs defined as {[M(dibpca)2(H2O)2]·3H2O·DMF}n (M = Co (1), Ni (2), H-dibpca = 3′,5′-di(1H-imidazol-1-yl)-[1,1′-biphenyl]-4-carboxylic acid) have been constructed, innovatively showing dual functions on chromism and electrocatalysis. The MOFs are networks consisting of 1D chains connected by nine types of hydrogen bonds. Upon dehydration/rehydration, 1 exhibits a more intelligent reversible chromic behavior via diverse pathways when compared to 2 with different metal nodes. Notably, the highly sensitive hydrochromism of 1 can be used for qualitative detection of water content in organic solvents ranging from 0 to 20% and can be repeated at least 10 times, presenting an instant, naked-eye visible and reusable detection tool. The conspicuous color variations are caused by the release/reuptake of coordinated waters, as confirmed by TGA and in situ FT-IR. In addition, the compounds also perform well in electrocatalytic hydrogen evolution reaction (HER) via water splitting. When loaded on carbon paper (CP) as a working electrode, 1 and 2 display high electrocatalytic HER activities with low overpotentials (195 and 207 mV) and Tafel slopes (107 and 93 mV dec–1), which is outstanding among pristine bulk MOF catalysts. The diverse functions of hydrogen-bonded MOFs facilitate the design and construction of functional complexes as well as the development of practical applications.
中文翻译：
两种新型氢键金属有机框架：可逆水变色和电催化析氢反应的双重功能
具有多功能功能的金属有机框架（MOF）因其独特的结构和性能而在广泛的领域中具有吸引力。这里，两个同构MOF定义为{[M(dibpca) 2 (H 2 O) 2 ]·3H 2 O·DMF} n (M = Co ( 1 ), Ni ( 2 ), H-dibpca = 3′,5构建了'-二(1 H-咪唑-1-基)-[1,1'-联苯]-4-羧酸)，创新性地表现出变色和电催化的双重功能。MOF 是由通过九种氢键连接的一维链组成的网络。脱水/再水合时，1与2具有不同的金属节点。值得注意的是， 1的高灵敏度水变色可用于定性检测0至20%范围内的有机溶剂中的水含量，并且可重复至少10次，提供了一种即时、肉眼可见且可重复使用的检测工具。TGA 和原位 FT-IR 证实，显着的颜色变化是由协调水的释放/再吸收引起的。此外，这些化合物在通过水分解的电催化析氢反应（HER）中也表现良好。当负载在碳纸 (CP) 作为工作电极时，1和2显示出高电催化 HER 活性以及低过电位（195 和 207 mV）和塔菲尔斜率（107 和 93 mV dec –1）），这在原始本体 MOF 催化剂中表现突出。氢键MOF的多样化功能促进了功能复合物的设计和构建以及实际应用的开发。
更新日期：2023-09-11
中文翻译：
两种新型氢键金属有机框架：可逆水变色和电催化析氢反应的双重功能
具有多功能功能的金属有机框架（MOF）因其独特的结构和性能而在广泛的领域中具有吸引力。这里，两个同构MOF定义为{[M(dibpca) 2 (H 2 O) 2 ]·3H 2 O·DMF} n (M = Co ( 1 ), Ni ( 2 ), H-dibpca = 3′,5构建了'-二(1 H-咪唑-1-基)-[1,1'-联苯]-4-羧酸)，创新性地表现出变色和电催化的双重功能。MOF 是由通过九种氢键连接的一维链组成的网络。脱水/再水合时，1与2具有不同的金属节点。值得注意的是， 1的高灵敏度水变色可用于定性检测0至20%范围内的有机溶剂中的水含量，并且可重复至少10次，提供了一种即时、肉眼可见且可重复使用的检测工具。TGA 和原位 FT-IR 证实，显着的颜色变化是由协调水的释放/再吸收引起的。此外，这些化合物在通过水分解的电催化析氢反应（HER）中也表现良好。当负载在碳纸 (CP) 作为工作电极时，1和2显示出高电催化 HER 活性以及低过电位（195 和 207 mV）和塔菲尔斜率（107 和 93 mV dec –1）），这在原始本体 MOF 催化剂中表现突出。氢键MOF的多样化功能促进了功能复合物的设计和构建以及实际应用的开发。
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