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π‐Conjugated soluble palladium poly‐ynes: Synthesis and fluorescence properties
Author(s) -
Yang Mujie,
Lei Ziqiang,
Wan Meixiang,
Shen Youqin,
Wang Jun,
Chen Jianxin,
Wang Hao,
Ye Tong
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970531)64:9<1657::aid-app1>3.0.co;2-e
Subject(s) - thiophene , monomer , polymer chemistry , condensation polymer , palladium , polymer , conjugated system , phosphine , fluorescence , chemistry , phenylene , benzene , photochemistry , materials science , organic chemistry , catalysis , physics , quantum mechanics
Insertion of thiophene‐2,5‐diyl, or 1,4‐phenylene into palladium poly‐ynes by the polycondensation of dihalide complexes PdCl 2 (PR 3 ) 2 (R = Ph o γ n‐butyl) with a di‐yne monomer (obtained from the reaction of equimolar quantities of p‐diethynyl‐benzene with 2,5‐diiodothiophene or 1,4‐diiodobenzene) affords a series of palladium poly‐ynes 1–6. The polymers/oligomers, soluble in common organic solvents, exhibit strong fluorescence at the excitation of UV‐visible light at room temperature. The emission intensity of the polymers/oligomers with thiophene‐2,5‐diyl is 3–17 times stronger than that of the analogous polymers without thiophene‐2,5‐diyl. Polymers with phenyl substituted phosphine ligands emit stronger emission than those only with n‐butyl phosphine ligands. The effects of molecular weight, ligands, solvents, and concentration on the fluorescence properties are also investigated. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1657–1665, 1997