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A New Series of Conjugated Platinum‐ co ‐Poly( p ‐phenylenebutadiynylene)s Polymers: Syntheses and Photophysical Properties
Author(s) -
Ahmed Md. Kausar,
Rahman Md. Mostafizur,
Naher Masnun,
Mehdi Shawon Shawrier,
Khan Atiqur Rahman,
Khan Mohammad Mizanur Rahman,
Islam S. M. Saiful,
Younus Muhammad,
Wedler Stefan,
Bagnich Sergey,
Hofmann AnnaLena,
Rudnick Alexander,
Köhler Anna
Publication year - 2019
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201800494
Subject(s) - platinum , chemistry , polymer , polymerization , phosphorescence , conjugated system , bifunctional , polymer chemistry , fluorescence , organic chemistry , catalysis , physics , quantum mechanics
An efficient route is developed to synthesize a series of platinum‐ co ‐poly( p ‐phenylenebutadiynylene)s (Pt‐ co ‐PPBs) polymers by stoichiometric mixing of poly( p ‐phenylenebutadiynylene)s (PPBs) and platinum bis‐phosphine dichlorides. This synthetic route involves two steps; first, oxidative coupling of diterminal phenyleneethynylenes (PEs) gives low‐molecular‐weight PPBs oligomers HCC(Ph(OR) 2 CCCC) n Ph(OR) 2 CCH (R = C 4 H 9 1 , R = C 8 H 17 2 , R = C 12 H 25 3 ) ( M n = 1000–3000, degrees of polymerization, P n ( M n ) = 4–6 ), which have bifunctional alkynyl end groups, and in the second step, these organic oligomers are allowed to react with trans ‐[(P n Bu 3 ) 2 PtCl 2 ] to form newly designed Pt‐ co ‐PPBs (R = C 4 H 9 4 , R = C 8 H 17 5 , R = C 12 H 25 6 ) polymers. The yield of 4–6 varies from good (63%) to high (76%) with high molecular weights ( M n ) ranging from 52 738 to 74 212, and this methodology tolerates different alkoxy substituted PPBs. These new organometallic polymers contain platinum to phenylenebutadiynylene (PB) ratio of 1:4 to 1:6 and are solution processable. Polymer 4 displays fluorescence at room temperature and fluorescence and phosphorescence at low temperature in thin film, which would be useful for studying the triplet emission in these polymers.