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The Quantitative Evaluations of the Luminescent Sensing Ability to Cu 2+ Based on Two Homologous Crystalline Coordination Polymers
Author(s) -
Pang LingYan,
Bai NanNan,
Jin JunCheng,
Yang GuoPing,
Wu YunLong,
Luan XinJun,
Wang YaoYu
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600790
Subject(s) - quenching (fluorescence) , luminescence , steric effects , materials science , polymer , crystallography , chemistry , chemical physics , analytical chemistry (journal) , stereochemistry , physics , fluorescence , organic chemistry , optoelectronics , optics
A systematic study has been well conducted on two new homologous Cd(II)‐based luminescent coordination polymers (LCPs), [Cd 3 (Httac) 2 (H 2 O) 8 ]⋅(H 2 O) 2 ( 1 ) and [Cd 2 (ttac)(H 2 O) 6 ]⋅(H 2 O) 6 ( 2 ), (H 4 ttac=1,1′,2′,1′′‐terphenyl‐4,4′,4′′,5′‐tetracarboxylic acid), to explore their sensing mechanisms to Cu 2+ . Both 1 and 2 are able to respond to Cu(NO 3 ) 2 through luminescent quenching but with the distinct quenching modes. The Stern‐Volmer curves of 1 and 2 both deviate from the linearity, indicating the coexistence of the dynamic and static quenching. Concentration‐dependent lifetime experiments have been carried out carefully to confirm the dynamic quenching and to calculate the dynamic constants quenching K c ; the static quenching is supported by time‐dependent intensity measurements where the intensities of 1 decrease along with time, while for 2 , it's a constant in time; the corresponding constants K s have also been obtained, thus achieving the quantitative evaluations of quenching processes. More importantly, the relationships between the sensing efficiency and inherent structures of two LCPs have been discussed, and the promotion suggestions have also been given finally.