Unconventional conjugation in macromonomers and polymers

Abstract

Multiple reviews have been written concerning conjugated macromonomers and polymers both as general descriptions and for specific applications. In most examples, conjugation occurs via elec-tronic communication via continuous overlap of...

Distinct insight into the use of difunctional double-decker silsesquioxanes as building blocks for alternating A–B type macromolecular frameworks

“…1,2 While their most important member is a cube-like T 8 derivative (RSiO 3/2 ) 8 , the doubledecker (DDSQ) analogues (open M 4 T 8 3 or closed D 2 T 8 4 ) have valuable utility. [5][6][7] SQ applications are in line with their intrinsic unique properties and have found broad applications as (nano)materials (nanofillers and modifiers), 8 in a variety of optic devices and sensors, [9][10][11] in medicine 12 or in catalysis. 13 The presence of reactive groups anchored onto the Si-O-Si core enables their precise modification and introduction of more complex functionalities.…”

Conjugation through Si–O–Si bonds, silsesquioxane (SQ) half cage copolymers, extended examples via SiO0.5/SiO1.5 units: multiple emissive states in violation of Kasha's rule

“…The objectives of the work reported here are to elaborate on our understanding of "unconventional conjugation" in SQs via efforts to identify copolymer systems with backbones consisting in part of Si-O-Si bonds that show photophysical and electrochemical behavior typically associated with conjugation in traditional conjugated organic polymers. 31,39 The approach chosen is to eliminate the cage but retain multiple, pendant Si-O-SiMe 2 vinyl links, with the idea that making the system look more like a polysiloxane would engender "insulating" properties in copolymers with aromatic and heteroaromatic comonomers.…”

Slick Synthetic Approach to Various Fluoroalkyl Silsesquioxanes—Assessment of their Dielectric Properties

“…[16,21,22]. As a result, they may be applied in the chemistry of materials (as nanofillers or polymer modifiers), [23][24][25] in optoelectronics, [26,27] catalysis [28,29] or even medicine (e.g., drug delivery systems) [30][31][32]. The application potential of silsesquioxanes lies in the ease of their modifications and the adjustments of functional groups anchored to the inorganic Si-O-Si core.…”

“…The crucial issue in this matter is the proper selection of the prefunctional moiety at SQs core for the selection of the respective reaction, usually catalytic, for its modification. Among the variety of catalytic processes, a few are of special importance due to their effectiveness and selectivity, i.e., hydrosilylation, cross-metathesis, coupling processes, e.g., Heck or Sonogashira, dehydrogenative coupling of Friedel-Crafts reaction [26,27,[33][34][35][36][37].…”