Branchy porphyrin molecule with intramolecular energy transfer and two-photon absorption characteristics
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 苏州恒久光电科技股份有限公司
- Publication Date
- 2009-05-20
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Abstract
Description
technical field
[0001] The present invention relates to a class of porphyrin derivatives, in particular to a class of symmetrical and asymmetrical conjugated multi-branched compounds with a porphine ring as the "core" and containing a diphenylamino group or a carbazole group, which have strong two-photon absorption properties and remarkable intramolecular energy transfer properties. Background technique
[0002] Two-photon absorption (TPA) is a process in which a medium molecule absorbs two photons simultaneously to transition from the ground state to the excited state under strong light excitation. It is characterized in that medium molecules have small absorption and dispersion of longer light waves, strong penetration ability of light waves, and the transition probability is proportional to the square of incident light intensity; under the condition of tight focusing of laser beams, the excited range of medium molecules is limited to lambda 3 Within the volume, the exci...