1
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Khokhar V, Deepika, Pandey S. Prototropic behavior of naphthalene derived probes in deep eutectic solvents. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2
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Sun X, Wang K, Liu H, Zhao Y, Li Y, Xie D. One-Pot Preparation of Benzotriazole-Modified Porous Silica for Durable UVA Absorption Ability. ACS OMEGA 2022; 7:1113-1120. [PMID: 35036774 PMCID: PMC8757326 DOI: 10.1021/acsomega.1c05682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
The durable application of poly(butylene adipate-co-terephthalate) (PBAT) under atmospheric conditions is restricted by its poor ultraviolet (UV) stability. To improve the anti-aging capacity to UV radiation of the PBAT film, we describe a straightforward and highly producible synthesis of UV-resistant dendrimeric porous silica nanospheres (SiO2-HBT) by adding benzotriazole as a pore-expanding agent, more importantly demonstrating its detailed mechanism. Well-dispersed silica nanospheres are shown to offer the release property for benzotriazole triggered by UV and heat irradiation while durable UV protection due to the supplementary of benzotriazole in the PBAT matrix. With benzotriazole compensation, the halving period of elongation at break performance was extended from about 15 to 48 h. Combined with gel content and gel permeation chromatography analyses, it was inferred that the process of crosslinking resulting from Norrish I can be effectively minimized by the action of SiO2-HBT. The design of modified release strategy realizes the durable UV absorption ability of the hydroxyphenyl benzotriazole class of photostabilizers in particular but more generally highlights an important adding method that should be considered when utilizing a photostabilizer.
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Affiliation(s)
- Xiaoyan Sun
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
| | - Ke Wang
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
| | - Hailu Liu
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
| | - Yang Zhao
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
| | - Yuan Li
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
| | - Dong Xie
- Institute
of Biological and Medical Engineering, Guangdong
Academy of Sciences, Guangzhou 510316, China
- Guangdong
Biomaterials Engineering Technology Research Center, Guangzhou 510316, China
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3
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Kumar V. 2-Naphthoic acid prototropism within ionic liquid based media. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Jia L, Liu Y. The effects of electron-withdrawing and electron-donating groups on the photophysical properties and ESIPT of salicylideneaniline. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 242:118719. [PMID: 32717523 DOI: 10.1016/j.saa.2020.118719] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 06/11/2023]
Abstract
The photophysical properties and excited state intramolecular proton transfer (ESIPT) of salicylideneaniline (1a) and its derivatives (1b-1e) with different substituents have been investigated using the DFT and TD-DFT methods. The calculated results indicate that the introduction of electron-withdrawing group CN weakens the intramolecular hydrogen bond (H···N). However, the introduction of electron-donating group N(CH3)2 strengthens it. When the CN and N(CH3)2 groups are introduced simultaneously, the intramolecular hydrogen bond (H···N) is weakened. In addition, swapping the CN and N(CH3)2 group positions can enhance the intramolecular hydrogen bond (H···N). Compared to 1a, the absorption and emission spectra of compounds 1b-1e are red-shifted. Frontier molecular orbital analyses prove that the more intense intramolecular charge transfer characters caused by CN and N(CH3)2 substituents is responsible for the red shift of spectra. Potential energy curves indicate that ESIPT in salicylideneaniline (1a) and the CN substituted derivative (1b) is a non-barrier process, while in the N(CH3)2 substituted derivative (1c) and the CN and N(CH3)2 co-substituted derivative (1d), ESIPT needs to overcome the energy barriers of 2.32 kcal/mol and 3.38 kcal/mol, respectively. Exchanging the positions of CN and N(CH3)2 groups (1e) makes the ESIPT into a barrier-free process. Therefore, the substitution and position of CN and N(CH3)2 groups can affect the ESIPT process and induce different photophysical properties.
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Affiliation(s)
- Lifeng Jia
- School of Physics, Henan Normal University, Xinxiang 453007, China.
| | - Yufang Liu
- School of Physics, Henan Normal University, Xinxiang 453007, China
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5
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Herzog B, Giesinger J, Settels V. Insights into the stabilization of photolabile UV-absorbers in sunscreens. Photochem Photobiol Sci 2020; 19:1636-1649. [PMID: 33300922 DOI: 10.1039/d0pp00335b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Sunscreens are used to protect human skin against harmful UV radiation. Today there is a trend towards high sun protection factors (SPF) and good UVA protection. Methods for the assessment of SPF and UVA protection involve irradiation of the product, and the photostability properties of the sunscreen have an influence on its performance. Sunscreens often contain more than one UV filter. Some photolabile UV absorbers may be stabilized by the presence of other photostable UV-absorbers. Stabilization can be achieved just by a certain optical density due to the presence of such UV-filter substances. However, photostabilization may also be caused by quenching mechanisms, such as singlet-singlet or triplet-triplet energy transfer. Investigation of butyl methoxy dibenzoylmethane and ethylhexyl methoxycinnamate as photolabile sunscreens in the presence of either octocrylene or bis ethylhexyloxyphenol methoxyphenyl triazine showed that both mechanisms may apply. With the systems butyl methoxy dibenzoylmethane plus octocrylene and ethylhexyl methoxycinnamate plus bis ethylhexyloxyphenol methoxyphenyl triazine the quenching mechanism appears to be predominant.
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Affiliation(s)
- Bernd Herzog
- BASF Grenzach GmbH, Koechlinstrasse 1, 79639 Grenzach-Wyhlen, Germany.
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6
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Mikhailov IE, Artyushkina YM, Dushenko GA, Minkin VI. Synthesis and Spectral-Luminescent Properties of
2-Aryl-5-butyl-1,3,4-oxadiazoles. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220110079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Li C, Tang Z, Zhou P, Guo W. A distinct excited-state proton transfer mechanism for 4-(N-Substituted-amino)-1H-pyrrolo[2,3-b]pyridines in aprotic and protic solvents. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 231:117800. [PMID: 31836400 DOI: 10.1016/j.saa.2019.117800] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Time-dependent density functional theory (TDDFT) method was used to study the different excited states proton transfer mechanism of DPP in cyclohexane (CHE) and Methanol (MeOH). The results indicate that the concerted mechanism and the stepwise mechanism coexist in the double proton transfer process of DPP dimer in the aprotic solvent CHE, the stepwise mechanism predominates. The stepwise mechanism can only carry out single proton transfer (DPP-SPT), the second proton cannot be transferred because it is hindered by high energy barriers. The concerted mechanism produces a double proton transfer (DPP-DPT). The potential energy surface of the DPP dimer was calculated and the double fluorescence phenomenon of DPP dimer observed by Chou et al. (P.T. Chou, Y.I. Liu, H.W. Liu, W.S. Yu, Dual Excitation behavior of double proton transfer versus Charge Transfer in 4-(N-Substituted Amino)-1H-pyrrolo[2,3-b]pyridines tuned by dielectric and hydrogen-bonding perturbation, J. Am. Chem. Soc., 123 (2001) 12119-12120) was explained. In view of the protonic solvent effect of methanol, the potential energy curve of the DPP/MeOH cluster was constructed. The fluorescence quenching process of DPP/MeOH clusters was elucidated. The proton transfer pathways of DPP/MeOH clusters are revealed in two different concerted ways (Type A: protons transfer from DPP molecules to MeOH solvent molecules; Type B: protons transfer from MeOH solvent to DPP molecules). The ESPT process of DPP molecules in the protic solvent MeOH was found to be more prone to Type B. The results can help to better understand the intermolecular hydrogen bonding mechanism of DPP molecules.
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Affiliation(s)
- Changming Li
- School of Electrical Engineering, University of South China, Hengyang 421001, PR China; Institute of Molecular Sciences and Engineering, Shandong University, Qingdao 266235, PR China
| | - Zhe Tang
- Institute of Molecular Sciences and Engineering, Shandong University, Qingdao 266235, PR China
| | - Panwang Zhou
- Institute of Molecular Sciences and Engineering, Shandong University, Qingdao 266235, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
| | - Wei Guo
- School of Electrical Engineering, University of South China, Hengyang 421001, PR China.
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8
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Huang F, An B, Jiang Y, Dun S, Zhang J, Guo X. Theoretical investigation of excited-state proton transfer (ESPT) for 2,5-bis(2-benzothiazolyl)hydroquinone: single or double? Mol Phys 2019. [DOI: 10.1080/00268976.2019.1705413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Fuhua Huang
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Beibei An
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Yumiao Jiang
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Shuopan Dun
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Jinglai Zhang
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Xugeng Guo
- Institute of Upconversion Nanoscale Materials, Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloy, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
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9
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Zheng D, Li H, Zhang M, Liu X, Yang D. The revelation of ESIPT behavior and fluoride response mechanism for (E)‐2‐(((1H‐benzo[d]imidazol‐2‐yl)‐imino)methyl)‐5‐(dimethylamino)‐phenol. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.4029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Dan Zheng
- College of ScienceHenan Agriculture University Zhengzhou P. R. China
| | - Hui Li
- College of ScienceHenan Agriculture University Zhengzhou P. R. China
| | - Mengjiao Zhang
- College of ScienceHenan Agriculture University Zhengzhou P. R. China
| | - Xiaobiao Liu
- College of ScienceHenan Agriculture University Zhengzhou P. R. China
| | - Dapeng Yang
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian P. R. China
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10
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Zhang W, Suzuki S, Cho S, Watanabe G, Yoshida H, Sakurai T, Aotani M, Tsutsui Y, Ozaki M, Seki S. Highly Miscible Hybrid Liquid-Crystal Systems Containing Fluorescent Excited-State Intramolecular Proton Transfer Molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14031-14041. [PMID: 31566386 DOI: 10.1021/acs.langmuir.9b02272] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Doping of luminescent molecules in a nematic liquid-crystal (LC) host is a convenient approach to develop light-emitting LC displays that would be a promising alternative to conventional LC displays. The requirements for the luminescent guest molecules include high miscibility in the host LC, high-order parameters in the host LC media to show anisotropic luminescence, lack of self-absorption, transparency in the visible region, and a large photoluminescence quantum yield independent of its concentration. To address these issues, here, we newly synthesize a highly miscible and fluorescent excited-state intramolecular proton transfer molecule, C4-C≡C-HBT, based on 2-(2-hydroxyphenyl)benzothiazole (HBT). This compound is highly miscible in a conventional room-temperature nematic LC 4-pentyl-4'-cyano biphenyl (5CB) up to 14 wt % (∼12 mol %) and exhibits a large photoluminescence quantum yield of ΦFL = 0.32 in the 5CB host, both of which were achieved by the introduction of an alkynyl group into the HBT core. C4-C≡C-HBT possesses a high-order parameter of S = 0.46 in 5CB, and the C4-C≡C-HBT/5CB mixtures show anisotropic fluorescence whose intensity is controlled by the applied electric field. A patterned image is demonstrated, which is not visible under an ambient environment but is readable upon UV illumination, relying on the orientational differences of ordered C4-C≡C-HBT molecules.
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Affiliation(s)
- Wanying Zhang
- Department of Molecular Engineering, Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Satoshi Suzuki
- Fukui Institute for Fundamental Chemistry , Kyoto University , Kyoto 606-8103 , Japan
| | - SeongYong Cho
- Division of Electrical, Electronic and Information Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
| | - Go Watanabe
- Department of Physics, School of Science , Kitasato University , Kitasato 1-15-1 , Minami-ku, Sagamihara , Kanagawa 252-0373 , Japan
| | - Hiroyuki Yoshida
- Division of Electrical, Electronic and Information Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
| | - Tsuneaki Sakurai
- Department of Molecular Engineering, Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Mika Aotani
- Department of Molecular Engineering, Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Yusuke Tsutsui
- Department of Molecular Engineering, Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Masanori Ozaki
- Division of Electrical, Electronic and Information Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
| | - Shu Seki
- Department of Molecular Engineering, Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan
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11
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Li C, Li Z, Ren X. Preparation and characterization of polyester fabrics coated with TiO2/Benzotriazole for UV protection. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.06.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Halder A, Bhattacharya B, Haque F, Dinda S, Ghoshal D. Polarity-Induced Excited-State Intramolecular Proton Transfer (ESIPT) in a Pair of Supramolecular Isomeric Multifunctional Dynamic Metal-Organic Frameworks. Chemistry 2019; 25:12196-12205. [PMID: 31276252 DOI: 10.1002/chem.201902673] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Indexed: 01/15/2023]
Abstract
A pair of supramolecular isomers of CdII -based MOF have been synthesized by utilizing a flexible N,N'-donor linker and a dicarboxylate with ESIPT (excited-state intramolecular proton transfer) fluorophore by varying the reaction media. One of the MOFs has a 3D four-fold interpenetrating framework with guest solvent in the structure that undergoes a solvent-dependent crystalline-to-crystalline structural transformation, which has been extensively studied by powder XRD and IR spectroscopy. The other MOF is structurally rigid in nature and has a two-fold interpenetrating structure without any guest molecules. Both the compounds show moderate CO2 adsorption and one of them, the MOF with the four-fold interpenetrating structure, also shows moderately high H2 adsorption. Furthermore, both the compounds show interesting luminescence behavior. In the solid state, the two compounds show single-peak spectra, whereas upon suspension of these compounds in polar solvents, the maxima split into two peaks with a large Stokes shift. On the other hand, in nonpolar solvents, only one emission maximum is observed. This solvatochromic dual-emission phenomenon is due to ESIPT, which has been extensively studied.
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Affiliation(s)
- Arijit Halder
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700 032, India
| | | | - Fazle Haque
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700 032, India
| | - Susanta Dinda
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700 032, India
| | - Debajyoti Ghoshal
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700 032, India
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13
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Fu J, Chang Y, Li B, Mei H, Yang L, Xu K. A novel fluorescent-colorimetric probe for Al 3+ and Zn 2+ ion detection with different response and applications in F - detection and cell imaging. Analyst 2019; 144:5706-5716. [PMID: 31436770 DOI: 10.1039/c9an01295h] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A novel Schiff base fluorescence probe (HL) was synthesized by the condensation of salicylaldehyde and an 8-aminoquinoline derivative. This probe acts as a "turn-on" dual selectivity fluorescence probe for Zn2+ and Al3+ ions, providing different colors and detection limits (DL) of 11.5 and 23.5 nM, respectively. Moreover, when Zn2+ and Al3+ co-exist, HL exhibits a preference for Al3+ by displacing Zn2+ from the HL-Zn2+ complex, realizing a dual-channel signal output for Al3+. The HL-Al3+ system could further discern F- by a "turn-off" fluorescence response with a DL of 86.0 nM. Furthermore, the probe HL was capable of monitoring intracellular Al3+, Zn2+ and F- in living PC12 cells in vitro through fluorescence imaging, which proved its value in potential in vivo applications.
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Affiliation(s)
- Jiaxin Fu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Yongxin Chang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Bai Li
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Huihui Mei
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Li Yang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Kuoxi Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China. and Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
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14
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Yao K, Fu J, Chang Y, Li B, Yang L, Xu K. A selective fluorescent probe for relay detection of Zn 2+ and tartrate: Application to logic circuit and living cell imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 205:410-418. [PMID: 30048942 DOI: 10.1016/j.saa.2018.07.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/16/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
A novel fluorescent probe 2-(2'-hydroxyphenyl)-4-(phenylethylamino)methyloxazole (HPO) has been synthesized, which performed highly selective and sensitive detection of Zn2+ ion with a discriminating enhancement over the other metal ions. The binding constant was calculated as 3.07 × 103 M-1 with detection limit of 1.22 × 10-6 M in aqueous solution (CH3CN-Tris v/v, 1/1, Tris, 10 mM, pH = 7.4). Moreover, the HPO-Zn2+ complex could serve as an excellent tartrate anion (TA). The detection mode maybe due to TA detach Zn2+ ion from HPO-Zn2+ complex leading to resulting in the release of the free probe HPO. As a result, a logic circuit has also been constructed on the basis of Zn2+ and TA as chemical inputs. Furthermore, fluorescence imaging experiments showed that probe HPO could be used as an effective fluorescent probe for detecting Zn2+ and TA in living cells.
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Affiliation(s)
- Kun Yao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jiaxin Fu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Yongxin Chang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Bai Li
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Li Yang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China; Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Kuoxi Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China; Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
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15
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Wen K, Guo X, Zhang J. Computational prediction on photophysical properties of two excited state intramolecular proton transfer (ESIPT) fluorophores bearing the benzothiazole group. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1542169] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Keke Wen
- Department of Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Xugeng Guo
- Department of Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
| | - Jinglai Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People’s Republic of China
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16
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Excited state intramolecular proton transfer induced fluorescence in triphenylamine molecule: Role of structural conformation and reversible mechanofluorochromism. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Liu X, Fu J, Yao K, Chang Y, Xu K, Yang L. Phenanthroline-based fluorescence sensors for Eu3+ ion and subsequent enantioselective discriminating of malate. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1517877] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiaoyan Liu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Jiaxin Fu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Kun Yao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Yongxin Chang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Kuoxi Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Li Yang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
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18
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Gong J, Li YH, Zhang CJ, Huang J, Sun Q. A thiazolo[4,5-b]pyridine-based fluorescent probe for detection of zinc ions and application for in vitro and in vivo bioimaging. Talanta 2018; 185:396-404. [DOI: 10.1016/j.talanta.2018.03.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/15/2018] [Accepted: 03/22/2018] [Indexed: 12/13/2022]
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Dai Y, Zhang M, Zhang M, Sun L, Meng J, Song P. Intramolecular hydrogen bonding promoted excited state double proton transfer mechanism based on a typical molecule: Porphycene. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 200:345-350. [PMID: 29709794 DOI: 10.1016/j.saa.2018.04.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 04/13/2018] [Accepted: 04/22/2018] [Indexed: 06/08/2023]
Abstract
The double excited state intramolecular proton transfer (ESIPT) mechanisms of porphycene, were theoretically studied. The primary bond lengths, IR vibrational spectra and hydrogen-bond energy indicate that the intramolecular hydrogen bonds were strengthened in the first excited state, which facilitate the ESIPT processes. To elucidate the proposed mechanism, the potential-energy surfaces of the ground state and first excited state were constructed as functions of NH bond lengths and its relative torsional angle rotation. The intramolecular proton transfer of prophycene is more likely to occur through lengthwise pathway and proceed in the concerted coordinated transfer manner.
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Affiliation(s)
- Yumei Dai
- Normal College, Shenyang University, Shenyang 110044, China
| | - Mengru Zhang
- Normal College, Shenyang University, Shenyang 110044, China
| | - Meixia Zhang
- College of Physics, Liaoning University, Shenyang 110036, China
| | - Liting Sun
- Mechanical Engineering College, Shenyang University, Shenyang 110044, China
| | - Jia Meng
- Normal College, Shenyang University, Shenyang 110044, China
| | - Peng Song
- College of Physics, Liaoning University, Shenyang 110036, China; Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials, Liaoning University, Shenyang 110036, China; State Key Laboratory of Molecular Reaction Dynamics, Dalian, China.
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20
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Kundu A, Karthikeyan S, Moon D, Anthony SP. Molecular Conformation- and Packing-Controlled Excited State Intramolecular Proton Transfer Induced Solid-State Fluorescence and Reversible Mechanofluorochromism. ChemistrySelect 2018. [DOI: 10.1002/slct.201801221] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Anu Kundu
- School of Chemical & Biotechnology; SASTRA Deemed University; Thanjavur-613401 Tamil Nadu India
| | - Subramanian Karthikeyan
- PG and Research Department of Chemistry; KhadirMohideen College; Adirampattinam-614701 Tamil Nadu India
| | - Dohyun Moon
- Beamline Department; Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang; Gyeongbuk Korea
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21
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Excited-state intramolecular proton transfer mechanism for 2-(quinolin-2-yl)-3-hydroxychromone: A detailed time-dependent density functional theory study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.094] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Choi E, Lee CH, Jun B, Nam EB, Jeong H, Lee SU. Efficiency Tuning of UVA/UVB Absorbance through Control over the Intramolecular Hydrogen Bonding of Triazine Derivatives. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Eunyoung Choi
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
| | - Chi Ho Lee
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
| | - Byeongsun Jun
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
| | - Eun Bi Nam
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
| | - Hoejoong Jeong
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
| | - Sang Uck Lee
- Department of Bionano Technology; Hanyang University; Ansan 15588 South Korea
- Department of Chemical and Molecular Engineering; Hanyang University; Ansan 15588 South Korea
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23
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Density Functional Theory Applied to Excited State Intramolecular Proton Transfer in Imidazole-, Oxazole-, and Thiazole-Based Systems. Molecules 2018; 23:molecules23051231. [PMID: 29883373 PMCID: PMC6100175 DOI: 10.3390/molecules23051231] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/15/2018] [Accepted: 05/17/2018] [Indexed: 01/28/2023] Open
Abstract
Excited state intramolecular proton transfer (ESIPT) is a photoinduced process strongly associated to hydrogen bonding within a molecular framework. In this manuscript, we computed potential energy data using Time Dependent Density Functional Theory (TDDFT) for triphenyl-substituted heterocycles, which evidenced an energetically favorable proton transfer on the excited state (i.e., ESIPT) but not on the ground state. Moreover, we describe how changes on heterocyclic functionalities, based on imidazole, oxazole, and thiazole systems, affect the ESIPT process that converts an enolic species to a ketonic one through photon-induced proton transfer. Structural and photophysical data were obtained theoretically by means of density functional theory (DFT) calculations and contrasted for the three heterocyclics. Different functionals were used, but B3LYP was the one that adequately predicted absorption data. It was observed that the intramolecular hydrogen bond is strengthened in the excited state, supporting the occurrence of ESIPT. Finally, it was observed that, with the formation of the excited state, there is a decrease in electronic density at the oxygen atom that acts as proton donor, while there is a substantial increase in the corresponding density at the nitrogen atom that serves as proton acceptor, thus, indicating that proton transfer is indeed favored after photon absorption.
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24
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Chaiwongwattana S, Škalamera Đ, Došlić N, Bohne C, Basarić N. Substitution pattern on anthrol carbaldehydes: excited state intramolecular proton transfer (ESIPT) with a lack of phototautomer fluorescence. Phys Chem Chem Phys 2018; 19:28439-28449. [PMID: 29039432 DOI: 10.1039/c7cp05472f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photophysical properties and excited state intramolecular proton transfer (ESIPT) reactivity for anthrol carbaldehydes 1-5 have been investigated computationally and experimentally by steady-state and time-resolved fluorescence and laser flash photolysis (LFP). 1,2-Disubstituted anthrol carbaldehydes 1 and 2 are not ESIPT reactive, contrary to naphthol analogues. The main deactivation channels from S1 for 1 and 2 are fluorescence (ΦF = 0.1-0.2) and intersystem crossing (ISC) to almost isoenergetic T2 states. The triplet states from 1 and 2 were detected by LFP (in N2-purged CH3CN, τ = 15 ± 2 μs for 1, and τ = 5.5 ± 0.1 μs for 2). In contrast, 2,3-disubstituted anthrols 3-5 undergo efficient barrierless ultrafast ESIPT. However, the typical dual emission from locally excited states and ESIPT tautomers were not observed since ESIPT proceeds via a conical intersection with S0 delivering the keto-tautomer in the hot ground state. Therefore, anthrols 3-5 are about ten times less fluorescent compared to 1 and 2, and the emission for 3-5 originates from less-populated conformers that cannot undergo ESIPT. Keto-tautomers for 3-5 were detected in CH3CN by LFP (λmax = 370 nm, τ = 30-40 ns). The difference in ESIPT reactivity for 1-3 was fully disclosed by calculations at ADC(2)/aug-cc-pVDZ level of theory, and particularly, by calculation of charge redistribution upon excitation to S1. Only 2,3-disubstituted anthrols exhibit polarization in S1 that increases the electron density on the carbonyl and decreases this density on the phenolic OH, setting the stage for ultrafast ESIPT.
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Affiliation(s)
- S Chaiwongwattana
- Institute of Science, Suranaree University of Technology, 30000 Nakhon Ratchasima, Thailand
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25
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Bao D, Wang M, Yang C, Yang Y, Ma X. Concerted Mechanisms of Excited-State Proton Intramolecular Transfer for Bis-2,4-(2-benzoxazolyl)-hydroquinone and Its Derivatives. J Phys Chem A 2017; 121:8217-8226. [PMID: 28994587 DOI: 10.1021/acs.jpca.7b07753] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The concerted mechanisms of excited state intramolecular proton transfer (ESIPT) of bis-2,4-(2-benzoxazolyl)-hydroquinone (BBHQ') and its derivatives (BBHQ'- and DHBO') have been investigated using the density functional theory (DFT) and the time-dependent density functional theory (TDDFT). The calculated absorption and emission spectra of BBHQ' and its derivatives are in good agreement with the experimental results. The calculated bond lengths, bond angles, and IR vibrational spectra linked with hydrogen bond of molecular BBHQ' in the S0 and S1 states demonstrate that the hydrogen bond is strengthened in the S1 state. Compared to BBHQ', BBHQ'- has a weak change of hydrogen bond between the S1 and S0 states. The calculation results show that there are three stable structures of BBHQ' in the S1 state. We find that the structure corresponding to the 481 nm fluorescence spectrum corresponds to BBHQ'-A rather than BBHQ'--K (Tetrahedron Lett., 2016, 57, 3518). The calculated frontier molecular orbitals (MOs) indicate the nature of the charge distribution and the trend of proton transfer of BBHQ'-A. The constructed potential energy surfaces of BBHQ' and DBHO' further elucidate the proposed mechanism that one-proton or two-proton transfer can happen (stepwise or synchronous) in the S1 states. The proposed ESIPT mechanism can provide a good explanation of the phenomenon of fluorescence quenching of BBHQ' and its derivatives. Finally, the weak interaction types are discriminated through the reduced density gradient (RDG) analyses of BBHQ' and BBHQ'-.
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Affiliation(s)
- Dongshuai Bao
- School of Physics and Optoelectronics Engineering, Ludong University , Yantai 264025, China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering, Ludong University , Yantai 264025, China
| | - Chuanlu Yang
- School of Physics and Optoelectronics Engineering, Ludong University , Yantai 264025, China
| | - Yunfan Yang
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Xiaoguang Ma
- School of Physics and Optoelectronics Engineering, Ludong University , Yantai 264025, China
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26
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Unique photoelectrocatalytic properties of a diphenyl-as-triazine-containing ruthenium(II) complex assembled on cadmium sulfide anode and cuprous oxide cathode towards ascorbate oxidation and oxygen reduction. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Kowser Z, Rayhan U, Rahman S, Georghiou PE, Yamato T. A fluorescence “turn-on” sensor for multiple analytes: OAc− and F− triggered fluorogenic detection of Zn2+ in a co-operative fashion. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.07.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Lan RF, Yang YF, Ma YZ, Li YQ. The theoretical study of excited-state intramolecular proton transfer of 2,5-bis(benzoxazol-2-yl)thiophene-3,4-diol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 183:37-44. [PMID: 28433832 DOI: 10.1016/j.saa.2017.04.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 04/12/2017] [Accepted: 04/15/2017] [Indexed: 06/07/2023]
Abstract
The symmetrical structures 2,5-bis(benzoxazol-2-yl)thiophene-3,4-diol (BBTD) can take shape two intramolecular hydrogen bonds in chloroform. In order to research the molecular dynamic behavior of BBTD upon photo-induced process, we utilize density functional theory (DFT) and time-dependent density functional theory (TDDFT) to complete theoretical calculation. Through the comparison of bond length, bond angle, IR spectra, and frontier molecular orbitals between ground state (S0) and first excited state (S1), it clearly indicates that photoexcitation have slightly influence for intensity of hydrogen bond. For the sake of understanding the mechanism of excited state intramolecular proton transfer (ESIPT) of BBTD in chloroform, potential energy surfaces have been scanned along with the orientation of O1-H2 and O4-H5 in S0 and S1 state, respectively. A intrigued hydrogen bond dynamic phenomenon has been found that ESIPT of BBTD is not a synergetic double proton transfer process, but a stepwise single proton transfer process BBTD→BBTD-S→BBTD-D. Moreover, the proton transfer process of BBTD-S→BBTD-D is easier to occur than that of BBTD→BBTD-S in S1 state.
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Affiliation(s)
- Rui-Fang Lan
- Department of Physics, Liaoning University, Shenyang 110036, PR China
| | - Yun-Fan Yang
- Department of Physics, Liaoning University, Shenyang 110036, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yan-Zhen Ma
- Department of Physics, Liaoning University, Shenyang 110036, PR China
| | - Yong-Qing Li
- Department of Physics, Liaoning University, Shenyang 110036, PR China.
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29
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Gelebart AH, Vantomme G, Meijer EW, Broer DJ. Mastering the Photothermal Effect in Liquid Crystal Networks: A General Approach for Self-Sustained Mechanical Oscillators. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1606712. [PMID: 28225174 DOI: 10.1002/adma.201606712] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 01/16/2017] [Indexed: 06/06/2023]
Abstract
Chemical networks and molecular switches dominate the area of research geared toward macroscopic motion of materials. A counter-intuitive approach to create self-sustained oscillation by light irradiation of ordinary photostabilizers in splay-aligned liquid-crystalline networks made from commercial mesogens is developed. Photostabilizers or any molecules that are able to quickly dissipate the absorbed light through heat, by vibrational and/or rotational modes, can reach self-oscillating macroscopic motion where self-shadowing plays a critical role. The mechanical self-oscillation is linked to temperature oscillations and the asymmetric response over the film thickness. Only a localized responsive zone, acting as hinge, activates the oscillation of a beam-shaped device. The outcome of this research is extended from UV to near-IR actuation, making bulk applications to convert sunlight into mechanical work within reach.
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Affiliation(s)
- Anne Helene Gelebart
- Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600, MB, Eindhoven, The Netherlands
| | - Ghislaine Vantomme
- Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600, MB, Eindhoven, The Netherlands
| | - E W Meijer
- Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600, MB, Eindhoven, The Netherlands
| | - Dirk J Broer
- Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600, MB, Eindhoven, The Netherlands
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30
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Cerezo J, Requena A, Zúñiga J, Piernas MJ, Santana MD, Pérez J, García L. Structure, Spectra, and DFT Simulation of Nickel Benzazolate Complexes with Tris(2-aminoethyl)amine Ligand. Inorg Chem 2017; 56:3663-3673. [DOI: 10.1021/acs.inorgchem.7b00059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javier Cerezo
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - Alberto Requena
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Zúñiga
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - María José Piernas
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - M. Dolores Santana
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Pérez
- Departamento de
Ingeniería Minera, Geológica y Cartográfica,
Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - Luís García
- Departamento de
Ingeniería Minera, Geológica y Cartográfica,
Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
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31
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An M, Kim BY, Seo H, Helal A, Kim HS. Fluorescence sensor for sequential detection of zinc and phosphate ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 169:87-94. [PMID: 27343439 DOI: 10.1016/j.saa.2016.06.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 04/28/2016] [Accepted: 06/17/2016] [Indexed: 06/06/2023]
Abstract
A new, highly selective turn-on fluorescent chemosensor based on 2-(2'-tosylamidophenyl)thiazole (1) for the detection of zinc and phosphate ions in ethanol was synthesized and characterized. Sensor 1 showed a high selectivity for zinc compared to other cations and sequentially detected hydrogen pyrophosphate and hydrogen phosphate. The fluorescence mechanism can be explained by two different mechanisms: (i) the inhibition of excited-state intramolecular proton transfer (ESIPT) and (ii) chelation-induced enhanced fluorescence by binding with Zn(2+). The sequential detection of phosphate anions was achieved by the quenching and subsequent revival of ESIPT.
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Affiliation(s)
- Miran An
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Bo-Yeon Kim
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hansol Seo
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Aasif Helal
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Hong-Seok Kim
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
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32
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Cao CT, Zhou W, Cao C. Abnormal effect of hydroxyl on the longest wavelength maximum in ultraviolet absorption spectra for bis-aryl Schiff bases. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3672] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao-Tun Cao
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan Provincial University Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan 411201 Hunan Province China
| | - Wei Zhou
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan Provincial University Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan 411201 Hunan Province China
| | - Chenzhong Cao
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan Provincial University Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan 411201 Hunan Province China
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33
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Lin H, Chang X, Yan D, Fang WH, Cui G. Tuning excited-state-intramolecular-proton-transfer (ESIPT) process and emission by cocrystal formation: a combined experimental and theoretical study. Chem Sci 2016; 8:2086-2090. [PMID: 28451328 PMCID: PMC5399640 DOI: 10.1039/c6sc04354b] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/14/2016] [Indexed: 12/16/2022] Open
Abstract
The formation of two-component molecular cocrystals can lead to the tunable excited state intramolecular proton transfer (ESIPT) process and emission, as first confirmed by both experimental and computational studies.
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Affiliation(s)
- Heyang Lin
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Xueping Chang
- Key Laboratory of Theoretical and Computational Photochemistry , Ministry of Education , College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China . ; ; ; Tel: +86-10-64412131
| | - Dongpeng Yan
- Key Laboratory of Theoretical and Computational Photochemistry , Ministry of Education , College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China . ; ; ; Tel: +86-10-64412131.,State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry , Ministry of Education , College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China . ; ; ; Tel: +86-10-64412131
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry , Ministry of Education , College of Chemistry , Beijing Normal University , Beijing 100875 , P. R. China . ; ; ; Tel: +86-10-64412131
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34
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Yang Y, Zhao J, Li Y. Theoretical Study of the ESIPT Process for a New Natural Product Quercetin. Sci Rep 2016; 6:32152. [PMID: 27574105 PMCID: PMC5004185 DOI: 10.1038/srep32152] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/02/2016] [Indexed: 12/14/2022] Open
Abstract
The investigation of excited-state intramolecular proton transfer (ESIPT) has been carried out via the density functional theory (DFT) and the time-dependent density functional theory (TDDFT) method for natural product quercetin in dichloromethane (DCM) solvent. For distinguishing different types of intramolecular interaction, the reduced density gradient (RDG) function also has been used. In this study, we have clearly clarified the viewpoint that two kinds of tautomeric forms (K1, K2)originated from ESIPT processconsist inthe first electronic excited state (S1). The phenomenon of hydrogen bonding interaction strengtheninghas been proved by comparing the changes of infrared (IR) vibrational spectra and bond parameters of the hydrogen bonding groups in the ground state with that in the first excited state. The frontier molecular orbitals (MOs)provided visual electron density redistribution have further verified the hydrogen bond strengthening mechanism. It should be noted that the ESIPT process of the K2 form is easier to occur than that of the K1 form via observing the potential energy profiles. Furthermore, the RDG isosurfaces has indicated that hydrogen bonding interaction of the K2 form is stronger than that of the K1 formin the S1 state, which is also the reason why the ESIPT process of the K2 form is easier to occur.
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Affiliation(s)
- Yunfan Yang
- Department of Physics, Liaoning University, Shenyang 110036, P. R. China
| | - Jinfeng Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Yongqing Li
- Department of Physics, Liaoning University, Shenyang 110036, P. R. China
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35
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Zhao J, Chen J, Liu J, Hoffmann MR. Competitive excited-state single or double proton transfer mechanisms for bis-2,5-(2-benzoxazolyl)-hydroquinone and its derivatives. Phys Chem Chem Phys 2016; 17:11990-9. [PMID: 25872615 DOI: 10.1039/c4cp05651e] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The excited state intramolecular proton transfer (ESIPT) mechanisms of 2-(2-hydroxyphenyl)benzoxazole (HBO), bis-2,5-(2-benzoxazolyl)-hydroquinone (BBHQ) and 2,5-bis(5'-tert-butyl-benzoxazol-2'-yl)hydroquinone (DHBO) have been investigated using time-dependent density functional theory (TDDFT). The calculated vertical excitation energies based on the TDDFT method reproduced the experimental absorption and emission spectra well. Three kinds of stable structures were found on the S1 state potential energy surface (PES). A new ESIPT mechanism that differs from the one proposed previously (Mordzinski et al., Chem. Phys. Lett., 1983, 101, 291. and Lim et al., J. Am. Chem. Soc., 2006, 128, 14542.) is proposed. The new mechanism includes the possibility of simultaneous double proton transfer, or successive single transfers, in addition to the accepted single proton transfer mechanism. Hydrogen bond strengthening in the excited state was based on primary bond lengths, angles, IR vibrational spectra and hydrogen bond energy. Intramolecular charge transfer based on the frontier molecular orbitals (MOs) also supports the proposed mechanism of the ESIPT reaction. To further elucidate the proposed mechanism, reduced dimensionality PESs of the S0 and S1 states were constructed by keeping the O-H distance fixed at a series of values. The potential barrier heights among the local minima on the S1 surface imply competitive single and double proton transfer branches in the mechanism. Based on the new ESIPT mechanism, the observed fluorescence quenching can be satisfactorily explained.
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Affiliation(s)
- Jinfeng Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China.
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36
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Cui Y, Li Y, Dai Y, Verpoort F, Song P, Xia L. Detailed theoretical investigation of excited-state intramolecular proton transfer mechanism of a new chromophore II. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 154:130-134. [PMID: 26523683 DOI: 10.1016/j.saa.2015.10.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/20/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
In the present work, TDDFT has been used to investigate the excited state intramolecular proton transfer (ESIPT) mechanism of a new chromophore II [Sensors and Actuators B: Chemical. 202 (2014) 1190]. The calculated absorption and fluorescence spectra agree well with experimental results. In addition, two types of II configurations are found in the first excited state (S1), which can be ascribed to the ESIPT reaction. Based on analysis of the calculated infrared (IR) spectra of O-H stretching vibration as well as the hydrogen bonding energies, the strengthening of the hydrogen bond in the S1 state has been confirmed. The frontier molecular orbitals (MOs), Hirshfeld charge distribution and the Natural bond orbital (NBO) have also been analyzed, which displays the tendency of the ESIPT process. Finally, potential energy curves of the S0 and S1 states were constructed, demonstrating that the ESIPT reaction can be facilitated based on the photo-excitation.
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Affiliation(s)
- Yanling Cui
- College of Physics and Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Yafei Li
- College of Physics and Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Yumei Dai
- Normal College, Shenyang University, Shenyang 110044, PR China
| | - Francis Verpoort
- Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center for Chemical and Material Engineering, Wuhan University of Technology, Wuhan 430070, PR China
| | - Peng Song
- College of Physics and Chemistry, Liaoning University, Shenyang 110036, PR China; Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials, Liaoning University, Shenyang 110036, PR China.
| | - Lixin Xia
- College of Physics and Chemistry, Liaoning University, Shenyang 110036, PR China.
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37
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Zhang YJ, Zhao JF, Li YQ. The investigation of excited state proton transfer mechanism in water-bridged 7-azaindole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 153:147-151. [PMID: 26301539 DOI: 10.1016/j.saa.2015.08.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 07/22/2015] [Accepted: 08/12/2015] [Indexed: 06/04/2023]
Abstract
Based on the time-dependent density functional theory (TDDFT), the excited-state intermolecular proton transfer (ESIPT) mechanism of water-bridged 7-azaindole has been investigated theoretically. The calculations of primary bond lengths and the IR vibrational spectra between the S0 state and the S1 state that verified the intramolecular hydrogen bond were strengthened. The fact that reproduced experimental absorbance and fluorescence emission spectra well theoretically demonstrate that the TDDFT theory we adopted is reasonable and effective. In addition, intramolecular charge transfer based on the frontier molecular orbitals demonstrated the indication of the ESIPT reaction. The constructed potential energy curves of ground state and the first excited state based on keeping the H2···O3 and H6···N7 distances fixed at a series of values have been used to illustrate the ESIPT process. A relative lower barrier of 5.94 kcal/mol in the S1 state potential energy curve for type II (lower than that of 9.82 kcal/mol in the S1 state for type I) demonstrates that type II ESIPT process occurs firstly in 7Al-2H2O complex.
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Affiliation(s)
- Yong-Jia Zhang
- Department of Physics, Liaoning University, Shenyang 110036, PR China
| | - Jin-Feng Zhao
- Department of Physics, Liaoning University, Shenyang 110036, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
| | - Yong-Qing Li
- Department of Physics, Liaoning University, Shenyang 110036, PR China; State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
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38
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Sun SM, Zhang S, Liu K, Wang YP, Zhou MM, Zhang B. Excited State Intramolecular Proton Transfer of 1-Hydroxyanthraquinone. CHINESE J CHEM PHYS 2015. [DOI: 10.1063/1674-0068/28/cjcp1504078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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39
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Yang D, Zhao J, Zheng R, Wang Y, Lv J. A DFT/TDDFT investigation of the excited state proton transfer reaction of fisetin chromophore. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:368-374. [PMID: 26143329 DOI: 10.1016/j.saa.2015.06.098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/09/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
In the present work, 3, 3', 4', 7-tetrahydroxyflavone (fisetin), as one of the most extensive distributed flavonoids, has been investigated on the excited state proton transfer (ESPT) based on the time-dependent density functional theory (TDDFT) method. The calculated absorption and fluorescence spectra based on the TDDFT method are in agreement with the experimental results. Two kinds of structures of fisetin chromophore are found in the first excited (S1) state, which may be due to the proton transfer reactive. Hydrogen bond strengthening has been testified in the S1 state based on comparing staple bond lengths and bond angles involved in hydrogen bonding between the S0 state and the S1 state. In addition, the calculated infrared spectra at the O-H stretching vibrational region and calculated hydrogen bond energy also declare the phenomenon of hydrogen bond strengthening. The frontier molecular orbitals (MOs) analysis and Natural bond orbital (NBO) manifest the intramolecular charge transfer of fisetin chromophore, which reveals the tendency of proton transfer. The potential energy surfaces of the S0 and S1 states are constructed to explain the mechanism of the proton transfer in excited state in detail.
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Affiliation(s)
- Dapeng Yang
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; State Key Laboratory of Molecular Reaction Dynamics, Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Jinfeng Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Theoretical and Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Rui Zheng
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
| | - Yusheng Wang
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
| | - Jian Lv
- College of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
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40
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A detailed theoretical investigation on the excited-state intramolecular proton-transfer mechanism of 3-BTHPB chemosensor. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1664-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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41
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Liu K, Zhao X, Liu Q, Huo J, Wang X, Wu Y. Investigation on the photophysical properties of ESPT inspired salicylaldehyde-based sensor for fluoride sensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:198-201. [PMID: 25594213 DOI: 10.1016/j.saa.2014.12.092] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 12/02/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
A simple, highly selective and sensitive chemosensor (E)-2-((quinolin-8-ylimino) methyl) phenol (QP) has been developed for the fluoride, as demonstrated by the photophysical properties obtained by UV-vis and fluorescent methods. Excited-state inter/intramolecular proton transfer (ESPT) was suggested to be responsible for the fluoride-induced 'turn on' fluorescence and the blue shift of 25 nm in the emission spectrum.
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Affiliation(s)
- Kai Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China.
| | - Xiaojun Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Qingxiang Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Jianzhong Huo
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China
| | - Xing Wang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China
| | - Yanping Wu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
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42
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Zhao J, Chen J, Cui Y, Wang J, Xia L, Dai Y, Song P, Ma F. A questionable excited-state double-proton transfer mechanism for 3-hydroxyisoquinoline. Phys Chem Chem Phys 2015; 17:1142-50. [DOI: 10.1039/c4cp04135f] [Citation(s) in RCA: 251] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Two excited state proton transfer mechanisms of 3-hydroxyisoquinoline (3HIQ) in cyclohexane and acetic acid (ACID) were investigated.
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Affiliation(s)
- Jinfeng Zhao
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
- State Key Lab of Molecular Reaction Dynamics
| | - Junsheng Chen
- State Key Lab of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Yanling Cui
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Jing Wang
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Lixin Xia
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Yumei Dai
- Normal College
- Shenyang University
- Shenyang 110044
- P. R. China
| | - Peng Song
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
- Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials
| | - Fengcai Ma
- College of Physics and College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
- Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials
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43
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New two-photon absorption benzotriazole–coumarin dyads: the evidence of internal proton transfer in the excited state. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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44
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Barman S, Mukhopadhyay SK, Gangopadhyay M, Biswas S, Dey S, Singh NDP. Coumarin–benzothiazole–chlorambucil (Cou–Benz–Cbl) conjugate: an ESIPT based pH sensitive photoresponsive drug delivery system. J Mater Chem B 2015; 3:3490-3497. [DOI: 10.1039/c4tb02081b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed an ESIPT based drug delivery system, Cou–Benz–Cbl conjugate, with pH sensitive fluorescence properties and photocontrolled release of the anticancer drug chlorambucil.
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Affiliation(s)
- Shrabani Barman
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | | | | | - Sandipan Biswas
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Satyahari Dey
- Department of Biotechnology
- Indian Institute of Technology
- Kharagpur 721302
- India
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Sarkar SK, Weragoda GK, Ranaweera RAAU, Gudmundsdottir AD. Phototautomerization on the Singlet and Triplet Surface in o-Hydroxyacetophenone Derivatives in Polar Solvents. J Phys Chem B 2014; 119:2668-76. [PMID: 25365215 DOI: 10.1021/jp509062w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Sujan K. Sarkar
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Geethika K. Weragoda
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | | | - Anna D. Gudmundsdottir
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
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46
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Wang L, Zhang Y, Li Y, He H, Zhang J. Photoinduced excited state intramolecular proton transfer of 2-(2′-hydroxyphenyl)phenanthro[9,10-d]oxazole: A comprehensive theoretical study. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.07.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Turn on ESPT: Novel salicylaldehyde based sensor for biological important fluoride sensing. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 138:75-9. [DOI: 10.1016/j.jphotobiol.2014.05.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 04/26/2014] [Accepted: 05/05/2014] [Indexed: 11/19/2022]
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48
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Li L, Mang Y, Jin D, Chen LG. A Simple Synthetic Method of a 1,3,5-Triazine UV Absorbent CGL-479 and Its Characterization. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Li
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 People's Republic of China
| | - You Mang
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 People's Republic of China
| | - Di Jin
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 People's Republic of China
| | - Li-gong Chen
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 People's Republic of China
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49
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Hu S, Liu K, Li Y, Ding Q, Peng W, Chen M. Investigation of excited-state intramolecular proton transfer coupled charge transfer reaction of paeonol. CAN J CHEM 2014. [DOI: 10.1139/cjc-2013-0286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An excited-state intramolecular proton transfer (ESIPT) coupled charge transfer reaction of paeonol was investigated both experimentally and theoretically. The ESIPT reaction of paeonol was predicted based on the large Stokes shift, which is observed in steady-state absorption and fluorescence spectra in an ethanol solution. The steady-state spectra in some solutions, such as methanol, ethanol, propanol, dichloromethane, and n-hexane, illustrate that the ESIPT reaction of paeonol has no dependence on the solvent properties. Therefore, the excited-state intermolecular proton transfer cannot be generated in protic solvents. Using the density functional theory and time-dependent density functional theory methods, we make a subsequent theoretical calculation that indicates that the ESIPT reaction of paeonol occurs through the intramolecular hydrogen bond O−H···O=C. The excited-state potential energy curve of paeonol indicates that the ESIPT reaction is a barrierless process, and the fluorescence emission of paeonol at 493 nm in the ethanol solution was assigned to the keto isomer fluorescence. Additionally, we also found an intramolecular charge transfer in the excited state by analysing the frontier molecular orbitals of paeonol.
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Affiliation(s)
- Shanshan Hu
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Kun Liu
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Yuanzuo Li
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Qianqian Ding
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Wei Peng
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Maodu Chen
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024, P.R. China
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50
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Hu SS, Liu K, Ding QQ, Peng W, Chen MD. Experimental and Theoretical Investigation on Excited State Intramolecular Proton Transfer Coupled Charge Transfer Reaction of Baicalein. CHINESE J CHEM PHYS 2014. [DOI: 10.1063/1674-0068/27/01/51-56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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