Lowest-Energy Crystalline Polymorphs of P3HT
Lowest-Energy Crystalline Polymorphs of P3HT
复制标题
P3HT 的最低能量晶体多晶型物
DOI:
10.1021/acs.jpcc.7b11271
复制
发表时间:
2018
影响因子:
3.7
通讯作者:
S. Tretiak
中科院分区:
文献类型:
--
作者:
A. Zhugayevych;O. Mazaleva;A. Naumov;S. Tretiak
We systematically study low-energy crystalline polymorphs of the archetypal conjugated polymer, regioregular poly-3-hexylthiophene (rr-P3HT) using the best available density functional theory methods benchmarked against the ab initio coupled cluster method. A comprehensive conformational search is performed for two-dimensional π-stacks being the most rigid structural unit of bulk P3HT. We have identified a number of nearly isoenergetic polymorphs below the energy level of room-temperature amorphous structures and well below the energy of optimized best-fit experimental models. Classical molecular dynamics simulations show that these crystals retain their structure at least at 200 K. At room temperature, although the conjugated backbone of the π-stack remains ordered, aliphatic side chains are melted, transforming from low-energy folded conformations to high-entropy fully unfolded structures. Our study shows that P3HT is a statistically frustrated system with multiple competing interactions, which complica...
影响因子:
--
作者:
K. Rahimi;I. Botiz;N. Stingelin;N. Kayunkid;M. Sommer;F. Koch;H. Nguyen;O. Coulembier;P. Dubois;M. Brinkmann;G. Reiter
通讯作者:
K. Rahimi;I. Botiz;N. Stingelin;N. Kayunkid;M. Sommer;F. Koch;H. Nguyen;O. Coulembier;P. Dubois;M. Brinkmann;G. Reiter