π-Conjugated soluble palladium poly-ynes: Synthesis and fluorescence properties

✍ Scribed by Mujie Yang; Ziqiang Lei; Meixiang Wan; Youqin Shen; Jun Wang; Jianxin Chen; Hao Wang; Tong Ye

• Book ID: 101252866
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 204 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970531)64:9<1657::aid-app1>3.0.co;2-e

✦ Synopsis

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 Å Ph o g n-butyl) with a di-yne monomer (obtained from the reaction of equimolar quantities of p-diethynylbenzene 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.