Evaluating the Effect of Heteroatoms on the Photophysical Properties of Donor–Acceptor Conjugated Polymers Based on 2,6-Di(thiophen-2-yl)benzo[1,2-b:4,5-b′]difuran: Two-Photon Cross-Section and Ultrafast Time-Resolved Spectroscopy
Evaluating the Effect of Heteroatoms on the Photophysical Properties of Donor–Acceptor Conjugated Polymers Based on 2,6-Di(thiophen-2-yl)benzo[1,2-b:4,5-b′]difuran: Two-Photon Cross-Section and Ultrafast Time-Resolved Spectroscopy
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DOI：
10.1021/acs.jpcc.7b01767
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发表时间：
2017-07
影响因子：
3.7
通讯作者：
R. Vázquez;Hyungjun Kim;Brandon M. Kobilka;Benjamin J. Hale;M. Jeffries‐EL;P. Zimmerman;T. Goodson-T.-Goodso
中科院分区：
文献类型：
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作者：
R. Vázquez;Hyungjun Kim;Brandon M. Kobilka;Benjamin J. Hale;M. Jeffries‐EL;P. Zimmerman;T. Goodson-T.-Goodso
研究了杂原子对4种以3，7-二十二烷基-2，6-二（噻吩-2-基）苯并[1，2-B：4，5-B′]二呋喃（BDF）为给体，3，6-二（噻吩-2-基）-1，4-二酮吡咯并[3，4-c]吡咯（TDPP）或3，6-二（2-呋喃基）-1，4-二酮吡咯并[3，4-c]吡咯（FDPP）为受体的共轭聚合物的电子和物理性质的影响.以呋喃为连接基的聚合物比其噻吩对应物表现出更高的消光系数。超快荧光衰减表明，激子弛豫过程的影响，在这些共轭聚合物中的连接器的类型。理论计算表明，以呋喃为连接基的聚合物比噻吩类似物更具有平面性。理论计算还表明，以噻吩为连接基的聚合物具有较大的跃迁偶极矩。双光子吸收截面（TPACS）的聚合物与呋喃作为连接体大于它们的噻吩聚合物类似物。这些结果表明，T…
We investigate the influence of the heteroatom on the electronic and photophysical properties of four conjugated polymers based on 3,7-didodecyl-2,6-di(thiophen-2-yl)benzo[1,2-b:4,5-b′]difuran (BDF) as the donor and 3,6-di(thiophen-2-yl)-1,4-diketopyrrolo[3,4-c]pyrrole (TDPP) or 3,6-di(2-furanyl)-1,4-diketopyrrolo[3,4-c]pyrrole (FDPP) as the acceptor. The polymers with a furan as the linker showed higher extinction coefficients than their thiophene counterparts. Ultrafast fluorescence decay showed that the exciton relaxation process is affected by the type of linker in these conjugated polymers. Theoretical calculations showed that the polymers with a furan as the linker are more planar than their thiophene analogues. Also, theoretical calculation showed that the polymers with a thiophene as the linker have larger transition dipole moments. The two-photon absorption cross sections (TPACS) of the polymers with a furan as the linker were larger than their thiophene polymer analogues. These results suggest t...