Enabling Lower Energy Light Harvesting in Stilbene-Based Photomechanical Polymers via Triplet Sensitization

被引：6

作者：

Beery, Drake ^{[1
]}

Stanisauskis, Eugenia ^{[2
,3
]}

McLeod, Grace M. ^{[1
]}

Das, Anjan ^{[1
]}

Guillory, Gina A. ^{[1
]}

Kennemur, Justin G. ^{[1
]}

Oates, William S. ^{[2
,3
]}

Hanson, Kenneth ^{[1
]}

机构：

[1] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA

[2] Florida A&M, Florida Ctr Adv Aero Prop FCAAP, Dept Mech Engn, Tallahassee, FL 32310 USA

[3] Florida State Univ, Tallahassee, FL 32310 USA

来源：

ACS APPLIED POLYMER MATERIALS | 2022年 / 4卷 / 06期

基金：

美国国家科学基金会;

关键词：

  actuators; composite materials; polyimides; photoisomerization; triplet sensitization; stilbene; INDUCED ORIENTATION; POLYIMIDE; CIS; POLARIZATION; ALIGNMENT; GLASSY;

D O I：

10.1021/acsapm.2c00660

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoresponsive polymers, typically activated with direct excitation of an azobenzene moiety, are an intriguing class of materials for application as adaptive structures. Here, we introduce triplet excited state sensitization as a mechanism to harness light in a stilbene-based photopolymer (i.e., the carbon analogue of azobenzene). While the undoped film shows no response, the sensitized film exhibits polarization dependent bending under 445 nm irradiation via (1) sensitizer excitation, (2) triplet energy transfer, (3) stilbene isomerization, and (4) subunit reorientation. This work is the first to demonstrate stilbene-based photopolymers and triplet sensitization as a low energy light harvesting mechanism in photomechanics.

引用

收藏

页码：4081 / 4086

页数：6

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