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个人信息Personal Information
研究员
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化学学院
学科:无机化学
办公地点:主校区海映楼514
电子邮箱:xjing@dlut.edu.cn
Redox-Active M8L6 Cubic Hosts with Tetraphenylethylene Faces Encapsulate Organic Dyes for Light-Driven H-2 Production
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论文类型:期刊论文
发表时间:2016-12-12
发表刊物:CHEMISTRY-A EUROPEAN JOURNAL
收录刊物:SCIE、EI、PubMed、Scopus
卷号:22
期号:50
页面范围:18107-18114
ISSN号:0947-6539
关键字:iron; metal-organic frameworks; photoinduced electron transfer; supramolecular chemistry; tetraphenylethylene
摘要:The design of artificial systems that mimic highly evolved and finely tuned natural enzymes is a promising subject of intensive research. The assembly of O-symmetric cubic structures with an Fe8L6 formula was reported through the direct combination of a C-4-symmetric tetraphenylethylene-based ligand with a C-3-symmetric tris(bipyridine)iron node. The robust metal-organic cubes are rich in pi-electron density and provide favorable interactions with planar polycyclic aromatic hydrocarbons. Within the confined space of the host, the aromatic hydrocarbons molecules are forced closer to the redox active host, and the photoinduced electron transfer (PET) is modified into a pseudo-intramolecular pathway. These iron vertices within the cubes exhibit suitable redox potential for electrochemical reduction of protons and the well-modified PET is further tailored to create artificial systems for light-driven hydrogen evolution from water through the encapsulation of fluorescein dyes. Control experiments based on a mononuclear compound resembling the iron corner of the octahedron suggest an enzymatic dynamic behavior. The new, well-elucidated reaction pathways and the increased molarity of the reaction within the confined space render these supramolecular systems superior to other relevant systems.