Efficient two-photon absorbing chromophores with fine-tuned π-bridges

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)219-224
Journal / PublicationMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2002
Externally publishedYes


TitleOrganic and Polymeric materials and Devices - Optical, Electrical and Optoelectronic Properties
PlaceUnited States
CitySan Francisco, CA
Period1 - 5 April 2002


A new series of symmetric two-photon absorbing chromophores with various π-bridges were synthesized. It has been shown that the spectra of two-photon absorption and two-photon induced fluorescence can be fined tuned by structural variations in the electronic nature and twist angle of π-bridges of D-π-D type chromophores. These chromophores exhibited large two-photon absorption cross-sections (up to 1800 GM), which were determined by two-photon induced fluorescence technique using femtosecond pulse excitation. The colors of two-photon pumped emission of these chromophores varied from blue to red (433 - 604 nm) as the structure of π-bridges changed.