Abstract
Conjugated polymers and oligomers have great potentials in various fields, especially in materials and biological sciences because of their intriguing electronic and optoelectronic properties. In recent years, the through-space conjugation system has emerged as a new assembled pattern of multidimensional polymers. Here, a novel series of structurally condensed multicolumn/multilayer 3D polymers and oligomers have been designed and synthesized through one-pot Suzuki polycondensation (SPC). The intramolecularly stacked arrangement of polymers can be supported by either X-ray structural analysis or computational analysis. In all cases, polymers were obtained with modest to good yields, as determined by GPC and 1H-NMR. MALDI-TOF analysis has proven the speculation of the step-growth process of this polymerization. The computational study of ab initio and DFT calculations based on trimer and pentamer models gives details of the structures and the electronic transition. Experimental results of optical and AIE research confirmed by calculation indicates that the present work would facilitate the research and applications in materials.
Highlights
Molecular design has been playing a key role in polymer and material sciences in searching for desired chemical, physical, and biological properties [1,2,3,4,5,6,7,8]
The thiadiazole scaffold occupies a special status in polymer science [38], and it played an important role for the discovery of three-layer 3D chirality [24]
Several other attempts failed in this synthesis
Summary
Molecular design has been playing a key role in polymer and material sciences in searching for desired chemical, physical, and biological properties [1,2,3,4,5,6,7,8] This is applicable to the research on conductive polymers, which has been among the most active topics in the past two decades [9,10,11,12,13,14]. Charge-transfer pathways hybridizing σ, π-, and through-space interactions have been proven to be feasible by carefully designing monomeric structures for poly- or copolymerizations [4, 6, 22]. These conjugated polymers displayed a series of electronic and
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