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A New Luminescent Terbium 4‐methylsalicylate Complex as a Novel Sensor for Detecting the Purity of Methanol
Author(s) -
Zeng ChengHui,
Yang YangYi,
Zhu YiMin,
Wang HongMing,
Chu TianShu,
Ng Seik Weng
Publication year - 2012
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.2012.01123.x
Subject(s) - luminescence , terbium , chemistry , acetonitrile , methanol , chloroform , ethyl acetate , fluorescence , hydrogen bond , impurity , phosphorescence , solvent , analytical chemistry (journal) , inorganic chemistry , molecule , organic chemistry , materials science , physics , optoelectronics , quantum mechanics
A new dinuclear terbium complex [Tb 2 (4‐msal) 6 (H 2 O) 4 ]·6H 2 O ( 1 ) (4‐msal = 4‐methylsalcylate) was synthesized. Its structure was determined by single crystal X‐ray diffraction, and the complex was characterized by PXRD, FT‐IR, fluorescence, TGA and DTA. Complex 1 exists as discrete molecules that are linked by extensive O–H … O hydrogen bonds into a 3D network. The luminescence lifetimes of 3 μ m methanol solution and solid sample of 1 are 1.321 and 1.009 ms, respectively. The quantum yield of solid sample is 6.0%. The luminescence quenched more than 50% when 3% (vol/vol) different impurities (acetone, acetonitrile, chloroform, dichloromethane, dioxane, DMF, DMSO, ethanol, ether, ethyl acetate, glycol, H 2 O, hexane, TEA, THF and toluene or their mixture) were added. The inverse linear relationship between the L g value of fluorescence intensity and the volume ratio of the minor component (to a maximum of 20%) is interpreted in terms of L g I = a − bX ( I : luminescence intensity; X : volume ratio of impurities in methanol; a , b are constants). So 1 is a potential luminescent sensor for analyzing the purity of methanol.