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Study of Linear and Nonlinear Optical Properties of Four Derivatives of Substituted Aryl Hydrazones of 1,8‐Naphthalimide
Author(s) -
Gu Peiyang,
Xu Xufeng,
Zhou Feng,
Zhao Tingting,
Ye Gaojie,
Liu Gaoyan,
Xu Qinghua,
Ge Jianfeng,
Xu Qingfeng,
Lu Jianmei
Publication year - 2014
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201300842
Subject(s) - chemistry , two photon absorption , absorption (acoustics) , conjugated system , z scan technique , femtosecond , nanosecond , hydrazone , laser , nonlinear optical , nonlinear optics , absorption cross section , excited state , photochemistry , aryl , wavelength , nonlinear system , analytical chemistry (journal) , optoelectronics , optics , organic chemistry , atomic physics , cross section (physics) , materials science , polymer , physics , alkyl , quantum mechanics
Abstract Four 1,8‐naphthalimide hydrazone molecules with different electron‐donating groups have been applied in the study of linear and nonlinear optical (NLO) properties. These compounds showed strong green emission in solution. Their NLO properties such as two‐photon absorption (TPA) behavior with femtosecond laser pulses ca. 800 nm and excited‐state absorption (ESA) behavior with nanosecond laser pulses at 532 nm were investigated. Compound 4 presented the largest two‐photon cross section (550 GM) among them due to two factors: the conjugated length of compound 4 is the longest and the electron‐donating ability of compound 4 is the strongest. Different from TPA behavior, compound 2 showed the best nonlinear absorption properties at 532 nm and its nonlinear absorption coefficient and third‐order nonlinear optical susceptibilities χ (3) were up to 1.41×10 −10 MKS and 4.65×10 −12 esu, respectively. Through the modification of the structure, the nonlinear optical properties of these compounds at different wavelengths (532 and 800 nm) were well tuned. The great broad‐band nonlinear optical properties indicate hydrazones are good candidates for organic nonlinear optical absorption materials.