Ultrafast excited state dynamics of six-branched styryl derivatives based on 1,3,5-triazine: Dissolved in chloroform solution or formed spin-coating film

Nondegenerate pump-probe experiment was performed to study the effect of the environment on the excited state decay dynamics of six-branched styryl derivatives based on 1,3,5-triazine. The two compounds were dissolved in CHCl3 solutions for research in solvent environment, and the spin-coating films were also prepared for reasearch in agglomerate state. Obvious different excited state dynamics were observed under two conditions. A fast process about several ps and a long process ∼100 ps were observed for compounds in CHCl3 solutions. However, another ultrafast process ∼0.8 ps was observed for compounds in spin-coating film condition, indicating some other decay channels and some processes of other mechanism.