Synthesis of Oligo(thiophene)-Coated Star-Shaped ROMP Polymers: Unique Emission Properties by the Precise Integration of Functionality

A facile synthesis of oligo­(thiophene)-modified (coated) “soluble” star (ball)-shaped polymers has been achieved via sequential living ring-opening metathesis polymerization (ROMP) of norbornene and a cross-linking reagent using Mo­(CHCMe₂Ph)­(N-2,6-^<i>i</i>Pr₂C₆H₃)­(O^<i>t</i>Bu)₂ as the initiator and oligo­(thiophene) carboxaldehydes for termination. The resultant star-shaped ROMP polymers containing ter- and tetrathiophene moieties exhibit unique emission properties due to an integration of the ROMP polymers (arranged functionalities): the blue emission was tuned to the white emission upon addition of 2-[2-[(<i>E</i>)-4-(dimethylamino)­styryl]-6-methyl-4<i>H</i>-pyran-4-ylidene]­malononitrile

Precise Synthesis of Poly(fluorene vinylene)s Capped with Chromophores: Efficient Fluorescent Polymers Modified by Conjugation Length and End-Groups

Poly­(9,9-di-<i>n</i>-octylfluorene-2,7-vinylene)­s containing F-BODIPY [PFV-(F-BODIPY)₂] and Zn­(II)-porphyrin have been prepared by olefin metathesis of the vinyl group in the PFV chain ends followed by subsequent Wittig-type coupling. An introduction of tris­(2,5-dialkoxy-1,4-phenylene vinylene) into PFV-(F-BODIPY)₂ has also been achieved. The emission properties can be modified by the PFV chain length, chromophore, and the middle segment: PFV-(F-BODIPY)₂ exhibits white-light emission with high quantum efficiency

Precise Synthesis of Poly(fluorene-2,7-vinylene)s Containing Oligo(thiophene)s at the Chain Ends: Unique Emission Properties by the End Functionalization

info:eu-repo/semantics/publishe