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.
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