Micro-tuning two-photon pumped lasing λmax of novel dyes

Abstract Based on trans -4-[ P -( N -ethyl- N -hydroxylethyl-amino)styryl]- N -methylpyridinium tetraphenylborate (ASPT), three novel compounds of two ASPT-like charge transfer moieties linked by σ-bond spacers to N -position of pyridine cycle were synthesized. An interesting phenomenon has been found that by changing the number of the σ-bond spacers, the transition energy level can be micro-tuned, leading to an obvious shift of lasing λ max or up-conversion lasing λ max position under single-photon and two-photon pumped condition. An explanation of this phenomenon was proposed according to the quantum chemical calculation.