Two-dimensional metal-organic framework with wide channels and responsive turn-on fluorescence for the chemical sensing of volatile organic compounds.
We report a 2D layered metal-organic framework (MOF) with wide channels named NUS-1 and its activated analogue NUS-1a composed of Zn4O-like secondary building units and tetraphenylethene (TPE)-based ligand 4,4'-(2,2-diphenylethene-1,1-diyl)dibenzoic acid. Due to its special structure, NUS-1a exhibits unprecedented gas sorption behavior, glass-transition-like phase transition under cryogenic conditions, and responsive turn-on fluorescence to various volatile organic compounds. Our approach using angular ligand containing partially fixed TPE units paves a way toward highly porous MOFs with fluorescence turn-on response that will find wide applications in chemical sensing.
Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585.
Mei
M
Zhang
Guangxue
G
Feng
Zhegang
Z
Song
Yu-Peng
YP
Zhou
Hsiu-Yi
HY
Chao
Daqiang
D
Yuan
Tristan T Y
TT
Tan
Zhengang
Z
Guo
Zhigang
Z
Hu
Ben Zhong
BZ
Tang
Bin
B
Liu
Dan
D
Zhao
D000327:Adsorption; D005453:Fluorescence; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013499:Surface Properties; D055549:Volatile Organic Compounds / Q000737:chemistry*
D009942:Organometallic Compounds; D055549:Volatile Organic Compounds