Journal
POLYMER CHEMISTRY
Volume 14, Issue 18, Pages 2205-2211Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3py00243h
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Second-order nonlinear optical (NLO) linear-dendritic (L-D) copolymers were designed and prepared by combining a dendritic chromophore with alkyl chains or alkoxy chains. A much enhanced macroscopic NLO performance was achieved due to the lower rotational barrier of the ether bond, with the highest d(33) value of 166 pm·V-1, approximately 1.8 times that of P1 (94 pm·V-1). This finding opens up a new approach for efficiently controlling the poling efficiency and boosting the NLO performance of polymeric materials.
Second-order nonlinear optical (NLO) linear-dendritic (L-D) copolymers were designed and successfully prepared by the combination of a dendritic chromophore and an alkyl chain (P1) or alkoxy chains (P2-P5). Thanks to the lower rotational barrier of the ether bond than that of the single carbon-carbon one, much enhanced macroscopic NLO performance, as characterized by d(33) values, was achieved with the highest value of 166 pm V-1, approximately 1.8 times that of P1 (94 pm V-1). This finding opens up a new approach to the efficient control of the poling efficiency of chromophore moieties by subtle modifications to boost the NLO performance of polymeric materials as high as possible.
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