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1.	Zhang, Qiong, et al. (author) Nonlinear optical response and two-photon biological applications of a new family of imidazole-pyrimidine derivatives 2016 In: Dyes and pigments. - : ELSEVIER SCI LTD. - 0143-7208 .- 1873-3743. ; 126, s. 286-295 Journal article (peer-reviewed)abstract A series of novel D-pi-A type two-photon absorption (2PA) imidazole-pyrimidine derivatives (EX-1 similar to EX-4) have been synthesized and characterized, with EX-1 was crystallography confirmed. Based on systematic photophysical investigations, the structure property relationships can be drawn as follows: (1) Both theoretical and experimental studies indicated that the different donor groups have large influences on the optical properties. (2) The 2PA cross-section values (sigma) were obtained both by Z-Scan and two photon excited fluorescence (2PEF) measurements. 2PA cross sections show an increasing trend with increasing electron-donating strength and the number of branches. (3) Comprehensively considered the optical performance, molecular volume, cytotoxicity and solubility, EX-1 and EX-2 were identified to be the best candidates for living cells (HepG2) imaging. Moreover, the 2PA excitable features of EX-1 and EX-2 are capable of imaging in fresh mouses liver tissues with a depth of ca. 70 mu m. (C) 2015 Elsevier Ltd. All rights reserved.

Zhang, Qiong, et al. (author)
Nonlinear optical response and two-photon biological applications of a new family of imidazole-pyrimidine derivatives
2016
In: Dyes and pigments. - : ELSEVIER SCI LTD. - 0143-7208 .- 1873-3743. ; 126, s. 286-295
Journal article (peer-reviewed)abstract
- A series of novel D-pi-A type two-photon absorption (2PA) imidazole-pyrimidine derivatives (EX-1 similar to EX-4) have been synthesized and characterized, with EX-1 was crystallography confirmed. Based on systematic photophysical investigations, the structure property relationships can be drawn as follows: (1) Both theoretical and experimental studies indicated that the different donor groups have large influences on the optical properties. (2) The 2PA cross-section values (sigma) were obtained both by Z-Scan and two photon excited fluorescence (2PEF) measurements. 2PA cross sections show an increasing trend with increasing electron-donating strength and the number of branches. (3) Comprehensively considered the optical performance, molecular volume, cytotoxicity and solubility, EX-1 and EX-2 were identified to be the best candidates for living cells (HepG2) imaging. Moreover, the 2PA excitable features of EX-1 and EX-2 are capable of imaging in fresh mouses liver tissues with a depth of ca. 70 mu m. (C) 2015 Elsevier Ltd. All rights reserved.

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