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Synthesis and spectroscopic properties of a novel zinc phthalocyanine with four 17‐membered crown ether voids
Author(s) -
Xiong GuoXiang,
Shen ShuYin,
Ye JianPing,
Zhou QingFu,
Xu HuiJun
Publication year - 1997
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19970150510
Subject(s) - chemistry , crown ether , phthalocyanine , fluorescence , photochemistry , ether , zinc , absorption (acoustics) , excited state , alkali metal , dimer , emission spectrum , absorption spectroscopy , spectral line , organic chemistry , ion , physics , quantum mechanics , astronomy , acoustics , nuclear physics
A novel zinc phthalocyanine containing four 17‐crown‐5 ether voids(17C5ZnPc) has been synthesized and characterized. UV‐visible absorption and fluorescence emission spectra and as sociated photophysical parameters have been determined. In contrast to most of the crown ether substituted phthalocyanines, no cofacial dimer formation is observed in the presence of alkali metal salts. In addition to the fluorescence at 710 nm from S 1 , a strong upper excited state (Soret S 2 ) emission around 424 nm has been detected for the first time in the phthalocyanine series. Fluorescence decay of S 1 and S 2 emission can be analyzed by mono‐ and biexponential fits respectively. X‐ray structure analysis showed that the crown ether unit is conformationally deformed and oblate that may account for the unusual spectroscopic properties.