Impact of constitutional isomerism on phosphorescence and anion-sensing properties of donor-acceptor organoboron Pt(II) complexes

被引：13

作者：

Betzile, Mei-Ni ^{[1
]}

Wang, Xiang ^{[1
]}

Hudson, Zachary M. ^{[1
]}

Wang, Suning ^{[1
]}

机构：

[1] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada

来源：

DALTON TRANSACTIONS | 2014年 / 43卷 / 36期

基金：

加拿大自然科学与工程研究理事会;

关键词：

3-COORDINATE ORGANOBORON; IRIDIUM(III) COMPLEX; MOLECULAR MATERIALS; TRANSFER EMISSION; METAL CHELATION; FLUORIDE; TRIARYLBORON; BLUE; EFFICIENCY; ELECTROPHOSPHORESCENCE;

D O I：

10.1039/c4dt01949k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new dimesitylboryl-functionalized molecule (NBppy) and its corresponding (NC)-C-Lambda chelate platinum(II) complex (Pt-NBppy) have been synthesized and fully characterized. The photophysical and electronic properties of NBppy and Pt-NBppy were examined and compared to their constitutional isomers, BNppy and Pt-BNppy, respectively. Due to the presence of the electron-donating diphenylamino group, the NBppy and BNppy compounds exhibit intense donor-acceptor charge transfer (CT) and bright blue fluorescence. Pt-NBppy displays weak phosphorescence, originating from a mixture of MLCT/pi ->pi* and CT transitions white Pt-BNppy displays bright phosphorescence originating from a CT transition. The Lewis acidity of the isomers was examined by fluoride titration experiments, which established that BNppy exhibits much higher affinity towards fluoride ions than NBppy. In addition, while the phosphorescence of Pt-BNppy is quenched by fluoride addition, Pt-NBppy demonstrates an unusual turn-on phosphorescent response towards fluoride ions, which illustrate the distinct impact of constitutional isomers on phosphorescence and anion sensing.

引用

页码：13696 / 13703

页数：8

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