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Cai Z, Hu R, Xiao Z, Feng J, Zou X, Wen G, Dong G, Zhang W. Charge photogeneration dynamics in non-fullerene polymer solar cells with fluorinated and non-fluorinated acceptors. J Chem Phys 2024; 160:074702. [PMID: 38364001 DOI: 10.1063/5.0177876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 01/22/2024] [Indexed: 02/18/2024] Open
Abstract
In this work, charge photogeneration and recombination processes of PM6:IDIC-4F and PM6:IDIC blend films were investigated by the steady-state and time-resolved spectroscopies, as well as the time-dependent density functional theory calculations. The peaks in absorption and photoluminescence (PL) spectra of IDIC and IDIC-4F solutions were assigned by combining the experiment and the simulation of UV-vis absorption and PL spectra. For neat acceptor films, the exciton diffusion length of neat IDIC and IDIC-4F films was estimated as ∼28.9 and ∼19.9 nm, respectively. For PM6-based blend films, we find that the fluorine substitution engineering on the IDIC acceptor material can increase the phase separate size of acceptor material in blend films, resulting in the reduction of dissociation efficiencies of acceptor excitons. In addition, we find that the charge recombination in PM6:IDIC-4F is dominated by bimolecular recombination, in comparison to geminate type carrier recombination in PM6:IDIC blend films. In addition, we find that thermal annealing treatment has a weak influence on carrier recombination but slightly reduces the exciton dissociation efficiency of acceptor in PM6:IDIC blend films, leading to a slightly reduced power conversion efficiency of PM6:IDIC solar cells. These results may shed light on the design of high-performance semiconductor molecules for application in solar cells.
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Affiliation(s)
- Zekai Cai
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
| | - Rong Hu
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zijie Xiao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
| | - Junyi Feng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
| | - Xianshao Zou
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao CN-266 000, China
- Division of Chemical Physics, Lund University, 221 00 Lund, Sweden
| | - Guanzhao Wen
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510006, China
| | - Geng Dong
- Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou 515041, China
| | - Wei Zhang
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduate School of Guangzhou University, Guangzhou 510006, China
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2
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Ma XX, Geng MH, Cheng XY, Zhang TS, Li ZL, Zhao K. Excellent ratiometric two-photon fluorescent probes for hydrogen sulfide detection based on the fluorescence resonance energy transfer mechanism. Phys Chem Chem Phys 2024; 26:6008-6021. [PMID: 38293905 DOI: 10.1039/d3cp05329f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Fluorescence resonance energy transfer (FRET) is an important mechanism to design ratiometric fluorescent probes that are able to detect analytes quantitatively according to the ratio of two well-resolved emission signals. Two-photon (TP) fluorescent probes can realize the detection in living cells and tissues with deeper penetration depth, higher resolution, and lower photodamage in contrast to one-photon fluorescent probes. However, to date, fabricating TP-FRET ratiometric fluorescent probes possessing large two-photon absorption (TPA), high fluorescence quantum yield and perfect FRET efficiency is still challenging. Consequently, to develop excellent TP-FRET ratiometric probes and explore the relationship between their molecular structures and TP fluorescence properties, in this paper, we designed a series of H2S-detecting TP fluorescent probes employing the FRET mechanism based on an experimental probe BCD. Thereafter, we comprehensively evaluated the TP sensing performance of these probes by means of time-dependent density functional theory and quadratic response theory. Furthermore, we determined energy transfer efficiency and fluorescence quantum yield. Significantly, through regulating benzene-fused positions, we successfully improved fluorescence quantum yield and TPA cross-section simultaneously. Large spectral overlap between energy donor emission and acceptor absorption was achieved and near perfect energy transfer efficiency was acquired for all the studied probes. We revealed that these probes exhibit two well-resolved TPA bands, which are contributed by FRET donors and acceptors, respectively. Especially, both the wavelengths and the cross-sections of the two TPA bands agree well with those of energy donors and acceptors, which is the unique TPA spectral profile of FRET probes and has never been previously reported. Moreover, we proposed an excellent TP-FRET probe BCD3 and its product molecule BCD3-H2S, which exhibit large Stokes (141 nm and 88 nm) and emission shifts (5931 cm-1), as well as greatly increased TP action cross-sections (24-fold and 60-fold) in the near-infrared region with respect to BCD and BCD-H2S. Our detailed study can give an insight into the efficient design of novel TP-FRET fluorescent probes.
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Affiliation(s)
- Xue-Xue Ma
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
| | - Ming-Hui Geng
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
| | - Xia-Yu Cheng
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
| | - Tong-Shu Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
| | - Zong-Liang Li
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
| | - Ke Zhao
- School of Physics and Electronics, Shandong Normal University, Jinan, 250358, People's Republic of China.
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3
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Wang X, Yu H, Li Q, Tian Y, Gao X, Zhang W, Sun Z, Mou Y, Sun X, Guo Y, Li F. Development of a fluorescent sensor based on TPE-Fc and GSH-AuNCs for the detection of organophosphorus pesticide residues in vegetables. Food Chem 2024; 431:137067. [PMID: 37579609 DOI: 10.1016/j.foodchem.2023.137067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/14/2023] [Accepted: 07/30/2023] [Indexed: 08/16/2023]
Abstract
A novel dual-signal fluorescent sensor was developed for detecting organophosphorus pesticides (OPs). It relies on the catalytic activities of acetylcholinesterase (AChE) and choline oxidase (ChOx) to generate hydrogen peroxide (H2O2) through the conversion of acetylcholine (ACh) to choline·H2O2 then oxidizes ferrocene-modified tetraphenylethylene (TPE-Fc) to its oxidized state (TPE-Fc+), resulting in enhanced cyan fluorescence due to aggregation. Simultaneously, ferrocene oxidation generates hydroxyl radicals (•OH), causing a decrease in orange fluorescence of glutathione-synthesized gold nanoclusters (GSH-AuNCs). The presence of OPs restricts AChE activity, reducing H2O2 production. Increasing OPs concentration leads to decreased cyan fluorescence and increased orange fluorescence, enabling visual OPs detection. The sensor has a linear dynamic range of 10-2000 ng/mL with a detection limit of 2.05 ng/mL. Smartphone-based color identification and a WeChat mini program were utilized for rapid OPs analysis with successful outcomes.
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Affiliation(s)
- Xiaoyang Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Huajie Yu
- State Key Laboratory for Modification of Chemical Fiber and Polymer Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Qiuhong Li
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong 255049, China
| | - Yuhang Tian
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Xiaolin Gao
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Wanqi Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Zhicong Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Yaoting Mou
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Xia Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Yemin Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China
| | - Falan Li
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 12 Zhangzhou Road, Zibo 255049, Shandong Province, China.
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4
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Fanciullo G, Orlandi S, Klymchenko AS, Muccioli L, Rivalta I. Characterizing Counterion-Dependent Aggregation of Rhodamine B by Classical Molecular Dynamics Simulations. Molecules 2023; 28:4742. [PMID: 37375296 DOI: 10.3390/molecules28124742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
The aggregation in a solution of charged dyes such as Rhodamine B (RB) is significantly affected by the type of counterion, which can determine the self-assembled structure that in turn modulates the optical properties. RB aggregation can be boosted by hydrophobic and bulky fluorinated tetraphenylborate counterions, such as F5TPB, with the formation of nanoparticles whose fluorescence quantum yield (FQY) is affected by the degree of fluorination. Here, we developed a classical force field (FF) based on the standard generalized Amber parameters that allows modeling the self-assembling process of RB/F5TPB systems in water, consistent with experimental evidence. Namely, the classical MD simulations employing the re-parametrized FF reproduce the formation of nanoparticles in the RB/F5TPB system, while in the presence of iodide counterions, only RB dimeric species can be formed. Within the large, self-assembled RB/F5TPB aggregates, the occurrence of an H-type RB-RB dimer can be observed, a species that is expected to quench RB fluorescence, in agreement with the experimental data of FQY. The outcome provides atomistic details on the role of the bulky F5TPB counterion as a spacer, with the developed classical FF representing a step towards reliable modeling of dye aggregation in RB-based materials.
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Affiliation(s)
- Giacomo Fanciullo
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Silvia Orlandi
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Andrey S Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
| | - Luca Muccioli
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Ivan Rivalta
- Dipartimento di Chimica Industriale "Toso Montanari", Alma Mater Studiorum, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 Allée d'Italie, 69364 Lyon, France
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5
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Coppola F, Cimino P, Perrella F, Crisci L, Petrone A, Rega N. Electronic and Vibrational Manifold of Tetracyanoethylene-Chloronaphthalene Charge Transfer Complex in Solution: Insights from TD-DFT and Ab Initio Molecular Dynamics. J Phys Chem A 2022; 126:7179-7192. [PMID: 36174118 PMCID: PMC9574931 DOI: 10.1021/acs.jpca.2c05001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/17/2022] [Indexed: 11/29/2022]
Abstract
The interplay between light absorption and the molecular environment has a central role in the observed photophysics of a wide range of photoinduced chemical and biological phenomena. The understanding of the interplay between vibrational and electronic transitions is the focus of this work, since it can provide a rationale to tune the optical properties of charge transfer (CT) materials used for technological applications. A clear description of these processes poses a nontrivial challenge from both the theoretical and experimental points of view, where the main issue is how to accurately describe and probe drastic changes in the electronic structure and the ultrafast molecular relaxation and dynamics. In this work we focused on the intermolecular CT reaction that occurs upon photon absorption in a π-stacked model system in dichloromethane solution, in which the 1-chloronaphthalene (1ClN) acts as the electron donor and tetracyanoethylene (TCNE) is the electron acceptor. Density functional theory calculations have been carried out to characterize both the ground-state properties and more importantly the low-lying CT electronic transition, and excellent agreement with recently available experimental results [Mathies, R. A.; et al. J. Phys. Chem. A 2018, 122 (14), 3594] was obtained. The minima of the ground state and first singlet excited state have been accurately characterized in terms of spatial arrangements and vibrational Raman frequencies, and the CT natures of the first two low-lying electronic transitions in the absorption spectra have been addressed and clarified too. Finally, by modeling the possible coordination sites of the TCNE electron acceptor with respect to monovalent ions (Na+, K+) in an implicit solution of acetonitrile, we find that TCNE can accommodate a counterion in two different arrangements, parallel and orthogonal to the C═C axis, leading to the formation of a contact ion pair. The nature of the counterion and its relative position entail structural modifications of the TCNE radical anion, mainly the central C═C and C≡N bonds, compared to the isolated case. An important red shift of the C═C stretching frequency was observed when the counterion is orthogonal to the double bond, to a greater extent for Na+. On the contrary, in the second case, where the counterion ion lies along the internuclear C═C axis, we find that K+ polarizes the electron density of the double bond more, resulting in a greater red shift than with Na+.
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Affiliation(s)
- Federico Coppola
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, 80126 Napoli, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
| | - Paola Cimino
- Department
of Pharmaceutical Sciences, University of
Salerno, 84084 Fisciano, Italy
| | - Fulvio Perrella
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, 80126 Napoli, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
| | - Luigi Crisci
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, 80126 Napoli, Italy
| | - Alessio Petrone
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, 80126 Napoli, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
- Istituto
Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte S. Angelo ed. 6, 80126 Napoli, Italy
| | - Nadia Rega
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, 80126 Napoli, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
- Istituto
Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte S. Angelo ed. 6, 80126 Napoli, Italy
- Centro
Interdipartimentale di Ricerca sui Biomateriali (CRIB), Piazzale Tecchio, 80125 Napoli, Italy
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6
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Walls B, Suleiman O, Arambula C, Hall A, Adeyiga O, Boumelhem F, Koh J, Odoh SO, Woydziak ZR. Improving the Brightness of Pyronin Fluorophore Systems through Quantum-Mechanical Predictions. J Phys Chem Lett 2022; 13:8312-8318. [PMID: 36040023 PMCID: PMC10543078 DOI: 10.1021/acs.jpclett.2c02287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The pyronin class of fluorophores serves a critical role in numerous imaging applications, particularly involving preferential staining of RNA through base pair intercalation. Despite this important role in molecular staining applications, the same set of century-old pyronins (i.e., pyronin Y (PY) and pyronin B (PB)), which possess relatively low fluorophore brightness, are still predominantly being used due to the lack of methodology for generating enhanced variants. Here, we use TD-DFT calculations of interconversion energies between structures on the S1 surface as a preliminary means to evaluate fluorophore brightness for a proposed set of pyronins containing variable substitution patterns at the 2, 3, 6, and 7 positions. Using a nucleophilic aromatic substitution/hydride addition approach, we synthesized the same set of pyronins and demonstrate that quantum-mechanical computations are useful for predicting fluorophore performance. We produced the brightest series of pyronin fluorophores described to date, which possess considerable gains over PY and PB.
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Affiliation(s)
- Brandon Walls
- Department of Physical and Life Sciences, Nevada State College, Henderson, NV 89002
| | | | - Carlos Arambula
- Department of Physical and Life Sciences, Nevada State College, Henderson, NV 89002
| | - Alyssa Hall
- Department of Physical and Life Sciences, Nevada State College, Henderson, NV 89002
| | | | - Fadel Boumelhem
- Department of Physical and Life Sciences, Nevada State College, Henderson, NV 89002
| | - Jungjae Koh
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, NV 89154
| | - Samuel O. Odoh
- Department of Chemistry, University of Nevada, Reno, NV 89557
| | - Zachary R. Woydziak
- Department of Physical and Life Sciences, Nevada State College, Henderson, NV 89002
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Liu T, Huang J, Ding H, Zhan C, Wang S. Molecular structure perspective on Temperature-Sensitive properties of rhodamine aqueous solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 275:121166. [PMID: 35313177 DOI: 10.1016/j.saa.2022.121166] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/09/2022] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
As one of the most commonly used organic fluorescent dyes, recently rhodamines have been successfully employed in temperature sensing. However, few works have been reported on their temperature-sensitive properties, which inevitably limiting their further applications. In order to solve such problem, we investigated temperature-sensitive properties of rhodamine 110, 123, 19, 6G, B and 3B focusing on their fluorescence emission spectra; and analyzed them in the molecular structure perspective. It is demonstrated that the fluorescence emission intensities of all studied rhodamines decreased with higher temperature, which inevitably enhances the probability of collisions among molecules, thus definitely leads to energy loss in fluorescence emission. While these rhodamines still have various temperature sensitivities mainly due to the substitutes: the substitute on the benzene carboxylate has little effect; the amino substituents of the three-ring xanthene enhance the temperature sensitivity due to their rotation weakening the rigidity of the three-ring xanthene; and the methyl substituents on the three-ring xanthene reduce the temperature sensitivity by enhancing the rigidity and stability of the three-ring xanthene as well as hindering the rotation of ethylamino. These findings can also be extended to other organic fluorescent dyes proved by coumarins comparable to rhodamines. The results provided by this work can be useful reference and guidance to further develop organic fluorescent dyes especially for temperature sensing.
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Affiliation(s)
- Ting Liu
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian 361021, China.
| | - Jianwei Huang
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian 361021, China
| | - He Ding
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian 361021, China
| | - Chengsen Zhan
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian 361021, China
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El Haitami A, Resmerita AM, Fichet O, Cantin S, Aubert PH, Farcas A. Synthesis, Photophysics, and Langmuir Films of Polyfluorene/Permodified Cyclodextrin Polyrotaxanes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11406-11413. [PMID: 34528811 DOI: 10.1021/acs.langmuir.1c02014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In the present study, we investigated the effect of permodified 2,3,6-tri-O-trimethylsilyl β- and γ-cyclodextrin (TMS·β-CD, TMS·γ-CD) encapsulation on the optical, electrochemical, morphological, and supramolecular arrangements of a poly[2,7'-(9,9-dioctylfluorene-alt-2',7-fluorene)] PF copolymer. For this purpose, the photophysical properties and Langmuir monolayer formation of PF·TMS·β-CD and PF·TMS·γ-CD polyrotaxanes were investigated and compared with those of the reference PF. Surface pressure-area isotherms and Brewster angle microscopy studies indicated the capability of both polyrotaxanes to organize into larger and homogeneous 2D supramolecular assemblies at the air-water interface. The obtained results suggest that the presence of the surrounding TMS·β-CD and TMS·γ-CD macrocycles on the PF backbones leads to changes in the conformation and hydrophobicity of the film surfaces. Our investigation offers a method to assess the impact of TMS-CD encapsulation on the control of 2D monolayer formation, with particular attention on the generation of stable PF monolayers for organic electronic devices.
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Affiliation(s)
| | | | | | | | | | - Aurica Farcas
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
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9
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Coppola F, Cimino P, Raucci U, Chiariello MG, Petrone A, Rega N. Exploring the Franck-Condon region of a photoexcited charge transfer complex in solution to interpret femtosecond stimulated Raman spectroscopy: excited state electronic structure methods to unveil non-radiative pathways. Chem Sci 2021; 12:8058-8072. [PMID: 34194695 PMCID: PMC8208128 DOI: 10.1039/d1sc01238j] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/27/2021] [Indexed: 01/12/2023] Open
Abstract
We present electronic structure methods to unveil the non-radiative pathways of photoinduced charge transfer (CT) reactions that play a main role in photophysics and light harvesting technologies. A prototypical π-stacked molecular complex consisting of an electron donor (1-chloronaphthalene, 1ClN) and an electron acceptor (tetracyanoethylene, TCNE) was investigated in dichloromethane solution for this purpose. The characterization of TCNE:π:1ClN in both its equilibrium ground and photoinduced low-lying CT electronic states was performed by using a reliable and accurate theoretical-computational methodology exploiting ab initio molecular dynamics simulations. The structural and vibrational time evolution of key vibrational modes is found to be in excellent agreement with femtosecond stimulated Raman spectroscopy experiments [R. A. Mathies et al., J. Phys. Chem. A, 2018, 122, 14, 3594], unveiling a correlation between vibrational fingerprints and electronic properties. The evaluation of nonadiabatic coupling matrix elements along generalized normal modes has made possible the interpretation on the molecular scale of the activation of nonradiative relaxation pathways towards the ground electronic state. In particular, two low frequency vibrational modes such as the out of plane bending and dimer breathing and the TCNE central C[double bond, length as m-dash]C stretching play a prominent role in relaxation phenomena from the electronic CT state to the ground state one.
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Affiliation(s)
- Federico Coppola
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M.S. Angelo via Cintia Napoli 80126 Italy
| | - Paola Cimino
- Department of Pharmaceutical Sciences, University of Salerno Salerno 84084 Italy
| | - Umberto Raucci
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M.S. Angelo via Cintia Napoli 80126 Italy
| | - Maria Gabriella Chiariello
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M.S. Angelo via Cintia Napoli 80126 Italy
| | - Alessio Petrone
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M.S. Angelo via Cintia Napoli 80126 Italy
| | - Nadia Rega
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M.S. Angelo via Cintia Napoli 80126 Italy
- Centro Interdipartimentale di Ricerca sui Biomateriali (CRIB) Piazzale Tecchio Napoli I-80125 Italy
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10
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Coppola F, Perrella F, Petrone A, Donati G, Rega N. A Not Obvious Correlation Between the Structure of Green Fluorescent Protein Chromophore Pocket and Hydrogen Bond Dynamics: A Choreography From ab initio Molecular Dynamics. Front Mol Biosci 2020; 7:569990. [PMID: 33195416 PMCID: PMC7653547 DOI: 10.3389/fmolb.2020.569990] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/11/2020] [Indexed: 11/23/2022] Open
Abstract
The Green Fluorescent Protein (GFP) is a widely studied chemical system both for its large amount of applications and the complexity of the excited state proton transfer responsible of the change in the protonation state of the chromophore. A detailed investigation on the structure of the chromophore environment and the influence of chromophore form (either neutral or anionic) on it is of crucial importance to understand how these factors could potentially influence the protein function. In this study, we perform a detailed computational investigation based on the analysis of ab-initio molecular dynamics simulations, to disentangle the main structural quantities determining the fine balance in the chromophore environment. We found that specific hydrogen bonds interactions directly involving the chromophore (or not), are correlated to quantities, such as the volume of the cavity in which the chromophore is embedded and that it is importantly affected by the chromophore protonation state. The cross-correlation analysis performed on some of these hydrogen bonds and the cavity volume, demonstrates a direct correlation among them and we also identified the ones specifically involved in this correlation. We also found that specific interactions among residues far in the space are correlated, demonstrating the complexity of the chromophore environment and that many structural quantities have to be taken into account to properly describe and understand the main factors tuning the active site of the protein. From an overall evaluation of the results obtained in this work, it is shown that the residues which a priori are perceived to be spectators play instead an important role in both influencing the chromophore environment (cavity volume) and its dynamics (cross-correlations among spatially distant residues).
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Affiliation(s)
- Federico Coppola
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Fulvio Perrella
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Alessio Petrone
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Greta Donati
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Nadia Rega
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.,Center for Advanced Biomaterials for Healthcare@CRIB, Naples, Italy
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11
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Spilarewicz-Stanek K, Jakimińska A, Kisielewska A, Batory D, Piwoński I. Understanding the Role of Silver Nanostructures and Graphene Oxide Applied as Surface Modification of TiO 2 in Photocatalytic Transformations of Rhodamine B under UV and Vis Irradiation. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4653. [PMID: 33086525 PMCID: PMC7603215 DOI: 10.3390/ma13204653] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/12/2020] [Accepted: 10/14/2020] [Indexed: 11/16/2022]
Abstract
This work is focused on photocatalytic properties of titanium dioxide thin coatings modified with silver nanostructures (AgNSs) and graphene oxide (GO) sheets which were analyzed in processes of chemical transformations of rhodamine B (RhB) under ultraviolet (UV) or visible light (Vis) irradiation, respectively. UV-Vis spectroscopy was applied to analyze the changes in the RhB spectrum during photocatalytic processes, revealing decolorization of RhB solution under UV irradiation while the same process coexisting with the transformation of RhB to rhodamine 110 was observed under Vis irradiation. The novelty of this study is the elaboration of a methodology for determining the parameters characterizing the processes occurring under the Vis irradiation, which enables the comparison of photocatalysts' activity. For the first time, the method for quantification of rhodamine B transformation into rhodamine 110 in the presence of a semiconductor under visible light irradiation was proposed. Photocatalysts with various surface architectures were designed. TiO2 thin coatings were obtained by the sol-gel method. GO sheets were deposited on their surface using the dip-coating method. AgNSs were photogenerated on TiO2 or grown spontaneously on GO flakes. For characterization of obtained photocatalysts, scanning electron microscopy (SEM), X-ray diffraction (XRD) and diffuse-reflectance spectroscopy (DRS) techniques were applied. The results indicate that the surface architecture of prepared coatings does not affect the main reaction path but have an influence on the reaction rates and yields of observed processes.
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Affiliation(s)
- Kaja Spilarewicz-Stanek
- Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163, 90-236 Lodz, Poland
| | - Anna Jakimińska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Aneta Kisielewska
- Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163, 90-236 Lodz, Poland
| | - Damian Batory
- Department of Vehicles and Fundamentals in Machine Design, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland
| | - Ireneusz Piwoński
- Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163, 90-236 Lodz, Poland
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12
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Donati G, Petrone A, Rega N. Multiresolution continuous wavelet transform for studying coupled solute-solvent vibrations via ab initio molecular dynamics. Phys Chem Chem Phys 2020; 22:22645-22661. [PMID: 33015693 DOI: 10.1039/d0cp02495c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Vibrational analysis in solution and the theoretical determination of infrared and Raman spectra are of key importance in many fields of chemical interest. Vibrational band dynamics of molecules and their sensitivity to the environment can also be captured by these spectroscopies in their time dependent version. However, it is often difficult to provide an interpretation of the experimental data at the molecular scale, such as molecular mechanisms or the processes hidden behind them. In this work, we present a theoretical-computational protocol based on ab initio molecular dynamics simulations and a combination of normal-like (generalized) mode analysis of solute-solvent clusters with a wavelet transform, for the first time. The case study is the vibrational dynamics of N-methyl-acetamide (NMA) in water solution, a well-known model of hydration of peptides and proteins. Amide modes are typical bands of peptide and protein backbone, and their couplings with the environment are very challenging in terms of the accurate prediction of solvent induced intensity and frequency shifts. The contribution of water molecules surrounding NMA to the composition of generalized and time resolved modes is introduced in our vibrational analysis, showing unequivocally its influence on the amide mode spectra. It is also shown that such mode compositions need the inclusion of the first shell solvent molecules to be accurately described. The wavelet analysis is proven to be strongly recommended to follow the time evolution of the spectra, and to capture vibrational band couplings and frequency shifts over time, preserving at the same time a well-balanced time-frequency resolution. This peculiar feature also allows one to perform a combined structural-vibrational analysis, where the different strengths of hydrogen bond interactions can quantitatively affect the amide bands over time at finite temperature. The proposed method allows for the direct connection between vibrational modes and local structural changes, providing a link from the spectroscopic observable to the structure, in this case the peptide backbone, and its hydration layouts.
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Affiliation(s)
- Greta Donati
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario di M. S. Angelo, Via Cintia, I-80126 Napoli, Italy.
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13
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Raucci U, Chiariello MG, Coppola F, Perrella F, Savarese M, Ciofini I, Rega N. An electron density based analysis to establish the electronic adiabaticity of proton coupled electron transfer reactions. J Comput Chem 2020; 41:1835-1841. [PMID: 32500950 DOI: 10.1002/jcc.26224] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/22/2020] [Accepted: 04/24/2020] [Indexed: 11/10/2022]
Abstract
Electrons and protons are the main actors in play in proton coupled electron transfer (PCET) reactions, which are fundamental in many biological (i.e., photosynthesis and enzymatic reactions) and electrochemical processes. The mechanism, energetics and kinetics of PCET reactions are strongly controlled by the coupling between the transferred electrons and protons. Concerted PCET reactions are classified according to the electronical adiabaticity degree of the process. To discriminate among different mechanisms, we propose a new analysis based on the use of electron density based indexes. We choose, as test case, the 3-Methylphenoxyl/phenol system in two different conformations to show how the proposed analysis is a suitable tool to discriminate between the different degree of adiabaticity of PCET processes. The very low computational cost of this procedure is extremely promising to analyze and provide evidences of PCET mechanisms ruling the reactivity of many biological and catalytic systems.
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Affiliation(s)
- Umberto Raucci
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di M.S.Angelo, Napoli, Italy
| | - Maria Gabriella Chiariello
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di M.S.Angelo, Napoli, Italy
| | - Federico Coppola
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di M.S.Angelo, Napoli, Italy
| | - Fulvio Perrella
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di M.S.Angelo, Napoli, Italy
| | | | - Ilaria Ciofini
- Chimie ParisTech, PSL Research University, CNRS, Institute of Chemistry for Life and Health Sciences, Paris, France
| | - Nadia Rega
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di M.S.Angelo, Napoli, Italy.,CRIB Center for Advanced Biomaterials for Healthcare, Napoli, Italy
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14
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Leite A, Cunha-Silva L, Silva D, Lobo Ferreira AIMC, Santos LMNBF, Cardoso ICS, Silva VLM, Rangel M, Silva AMG. Synthesis of Pyridyl and N-Methylpyridinium Analogues of Rosamines: Relevance of Solvent and Charge on Their Photophysical Properties. Chemistry 2019; 25:15073-15082. [PMID: 31379010 DOI: 10.1002/chem.201903313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Indexed: 01/16/2023]
Abstract
A series of pyridyl analogues of rosamines was prepared by employing two methodologies: (i) the conventional-heating condensation of a pyridinecarboxaldehyde with 3-(diethylamino)phenol in propionic acid, and (ii) the novel ohmic-heating assisted condensation under "on water" conditions, followed by oxidation. The 4-pyridyl substituted rosamine was further converted into the N-methylpyridinium derivative through N-alkylation using methyl iodide. The influence of the position and cationization of the nitrogen atom of the pyridyl ring in the physicochemical properties of fluorophores was investigated by 1 H, 13 C, 15 N NMR spectral analysis, UV/Vis and fluorescence spectroscopy, single-crystal X-ray diffraction (4-pyridyl and N-methylpyridinium derivatives) and thermal-behavior analysis. Curiously, for ethanolic solutions of 4-pyridyl and N-methylpyridinium derivatives an extinction of color and fluorescence over time was observed. This phenomenon was further studied and the data revealed that it is the result of nucleophilic addition of ethoxide ion to the central 9-position of the xanthene. The kinetics of the process is slower for the 4-pyridyl rosamine, which emphasizes the importance of the charge in the N-methylpyridinium analogue in the reactivity of the molecule towards a nucleophile agent. This phenomenon is reversible, meaning that the compounds can be rapidly recovered by decreasing the pH, opening new avenues in the sensing applications of this class of rosamines.
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Affiliation(s)
- Andreia Leite
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, 4169-007, Porto, Portugal
| | - Luís Cunha-Silva
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, 4169-007, Porto, Portugal
| | - Daniel Silva
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, 4169-007, Porto, Portugal
| | - Ana I M C Lobo Ferreira
- Centro de Investigação em Química (CIQUP), Departamento de, Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua Campo Alegre 687, 4169-007, Porto, Portugal
| | - Luís M N B F Santos
- Centro de Investigação em Química (CIQUP), Departamento de, Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua Campo Alegre 687, 4169-007, Porto, Portugal
| | - Inês C S Cardoso
- Departamento de Química, QOPNA e LAQV/REQUIMTE, Universidade de Aveiro, 3810-193, Aveiro, Portugal
| | - Vera L M Silva
- Departamento de Química, QOPNA e LAQV/REQUIMTE, Universidade de Aveiro, 3810-193, Aveiro, Portugal
| | - Maria Rangel
- LAQV/REQUIMTE, Instituto de Ciências Biomédicas de Abel Salazar, 4099-003, Porto, Portugal
| | - Ana M G Silva
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, 4169-007, Porto, Portugal
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15
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Perfetto A, Maschietto F, Ciofini I. Following excited states in molecular systems using density-based indexes: A dual emissive system as a test case. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Morsi RE, Elsawy M, Ali MM, Gentili D, Cavallini M, Manet I, Bandini E, Venturini A, Benaglia M, Ventura B. Rhodamine B hydrazide loaded polysulfone fabrics for Cu(II) detection: Morphological and optical properties. J Appl Polym Sci 2019. [DOI: 10.1002/app.48408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rania E. Morsi
- Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt
- Istituto ISOF‐CNR Via P. Gobetti 101, 40129 Bologna Italy
| | - Moataz Elsawy
- Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt
| | | | - Denis Gentili
- Istituto ISMN‐CNR Via P. Gobetti 101, 40129 Bologna Italy
| | | | - Ilse Manet
- Istituto ISOF‐CNR Via P. Gobetti 101, 40129 Bologna Italy
| | - Elisa Bandini
- Istituto ISOF‐CNR Via P. Gobetti 101, 40129 Bologna Italy
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17
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Farcas A, Assaf KI, Resmerita AM, Sacarescu L, Asandulesa M, Aubert PH, Nau WM. Cucurbit[7]uril-Threaded Poly(3,4-ethylenedioxythiophene): A Novel Processable Conjugated Polyrotaxane. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801724] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Aurica Farcas
- “Petru Poni” Institute of Macromolecular Chemistry; 700487 Iasi Romania
| | - Khaleel I. Assaf
- School of Engineering and Science; Jacobs University Bremen; Campus Ring 1 28759 Bremen Germany
| | | | - Liviu Sacarescu
- “Petru Poni” Institute of Macromolecular Chemistry; 700487 Iasi Romania
| | - Mihai Asandulesa
- “Petru Poni” Institute of Macromolecular Chemistry; 700487 Iasi Romania
| | - Pierre-Henri Aubert
- Laboratoire de Physicochimie des Polymères et des Interfaces (EA 2528); Institut des Matériaux; Université de Cergy-Pontoise; 5 mail Gay-Lussac 95031 Cergy-Pontoise Cedex France
| | - Werner M. Nau
- School of Engineering and Science; Jacobs University Bremen; Campus Ring 1 28759 Bremen Germany
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18
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Ferrari L, Satta M, Palma A, Di Mario L, Catone D, O'Keeffe P, Zema N, Prosperi T, Turchini S. A Fast Transient Absorption Study of Co(AcAc) 3. Front Chem 2019; 7:348. [PMID: 31165061 PMCID: PMC6536591 DOI: 10.3389/fchem.2019.00348] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/29/2019] [Indexed: 01/20/2023] Open
Abstract
The study of transition metal coordination complexes has played a key role in establishing quantum chemistry concepts such as that of ligand field theory. Furthermore, the study of the dynamics of their excited states is of primary importance in determining the de-excitation path of electrons to tailor the electronic properties required for important technological applications. This work focuses on femtosecond transient absorption spectroscopy of Cobalt tris(acetylacetonate) (Co(AcAc)3) in solution. The fast transient absorption spectroscopy has been employed to study the excited state dynamics after optical excitation. Density functional theory coupled with the polarizable continuum model has been used to characterize the geometries and the electronic states of the solvated ion. The excited states have been calculated using the time dependent density functional theory formalism. The time resolved dynamics of the ligand to metal charge transfer excitation revealed a biphasic behavior with an ultrafast rise time of 0.07 ± 0.04 ps and a decay time of 1.5 ± 0.3 ps, while the ligand field excitations dynamics is characterized by a rise time of 0.07 ± 0.04 ps and a decay time of 1.8 ± 0.3 ps. Time dependent density functional theory calculations of the spin-orbit coupling suggest that the ultrafast rise time can be related to the intersystem crossing from the originally photoexcited state. The picosecond decay is faster than that of similar cobalt coordination complexes and is mainly assigned to internal conversion within the triplet state manifold. The lack of detectable long living states (>5 ps) suggests that non-radiative decay plays an important role in the dynamics of these molecules.
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Affiliation(s)
- Luisa Ferrari
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
| | - Mauro Satta
- CNR-ISMN, Chemistry Department, Università di Roma Sapienza, Rome, Italy
| | - Amedeo Palma
- CNR-ISMN, Area della Ricerca di Roma 1 - Montelibretti, Rome, Italy
| | - Lorenzo Di Mario
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
| | - Daniele Catone
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
| | - Patrick O'Keeffe
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma 1 - Montelibretti, Rome, Italy
| | - Nicola Zema
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
| | - Tommaso Prosperi
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
| | - Stefano Turchini
- CNR-ISM, Division of Ultrafast Processes in Materials (FLASHit), Area della Ricerca di Roma Tor Vergata, Rome, Italy
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19
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Kung JCK, Forman A, Jockusch RA. The effect of methylation on the intrinsic photophysical properties of simple rhodamines. Phys Chem Chem Phys 2019; 21:10261-10271. [DOI: 10.1039/c9cp00730j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Gas-phase studies of progressively methylated rhodamines display unexpected photophysical trends that are obscured in solution, revealing key solvent effects.
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Affiliation(s)
| | - Adam Forman
- Department of Chemistry, University of Toronto
- Toronto
- Canada
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20
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Delor M, Dai J, Roberts TD, Rogers JR, Hamed SM, Neaton JB, Geissler PL, Francis MB, Ginsberg NS. Exploiting Chromophore–Protein Interactions through Linker Engineering To Tune Photoinduced Dynamics in a Biomimetic Light-Harvesting Platform. J Am Chem Soc 2018; 140:6278-6287. [DOI: 10.1021/jacs.7b13598] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | - Jeffrey B. Neaton
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
| | | | | | - Naomi S. Ginsberg
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
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21
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Catone D, O’Keeffe P, Satta M, Paladini A, Ciavardini A, Toschi F, Turchini S, Avaldi L. A combined theoretical and experimental study of the ultrafast photophysics of Rhodamine B. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1464670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Daniele Catone
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Patrick O’Keeffe
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Mauro Satta
- CNR-ISMN, Dipartimento di Chimica, University of Rome Sapienza , Rome, Italy
| | - Alessandra Paladini
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Alessandra Ciavardini
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Francesco Toschi
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Stefano Turchini
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
| | - Lorenzo Avaldi
- Istituto di Struttura della Materia-CNR (ISM-CNR), Division of Ultrafast Processes in Materials (FLASHit) , Rome, Italy
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22
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Pirillo J, Mazzone G, Russo N. Theoretical Insights into the Switching Off/On of 1 O 2 Photosensitization in Chemicontrolled Photodynamic Therapy. Chemistry 2018; 24:3512-3519. [PMID: 29314348 DOI: 10.1002/chem.201704768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Indexed: 01/17/2023]
Abstract
Density Functional Theory and time-dependent (TD) DFT calculations were carried out for recently reported 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based photosensitizers (PSs) that could be activated by reactive oxygen species (ROS) to generate 1 O2 specifically in target tissues. To assess the applicability of the compounds as activatable PSs (a-PSs) in photodynamic therapy, absorption wavelengths; singlet-triplet energy gaps; and spin-orbit matrix elements for the radiationless transition, Sn →Tm , were investigated. A TD-DFT qualitative analysis indicated that only a Br-substituted BODIPY derivative with the chromanol ring of α-tocopherol linked by methylene functioned as an a-PS. The chromanol ring promotes photoinduced electron transfer to the BODIPY unit that reduces the probability of intersystem crossing and triplet-state population, and can turn off 1 O2 photosensitization. Therefore, 1 O2 photosensitization can be switched on only in target cells in which the chromanol ring is oxidized by ROS. The oxidation reaction pathways of the most promising derivative, by either 1 O2 or cumyloxyl radical as typical ROS, have been examined to reveal that oxidation by the cumyloxyl radical is more effective than that by 1 O2 .
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Affiliation(s)
- Jenny Pirillo
- Institute of Transformative Bio-Molecules, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Arcavacata di Rende, Italy
| | - Nino Russo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Arcavacata di Rende, Italy
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23
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Pomogaev VA, Barachevsky VA, Tuktarov AR, Avramov PV, Artyukhov VY. Inheritance of Photochromic Properties of Nitro-Substituted and Halogenated Spiropyrans Containing the Pyrrolidino[60]fullerene. J Phys Chem A 2018; 122:505-515. [PMID: 29257862 DOI: 10.1021/acs.jpca.7b08374] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photophysical and isomerization properties of hybrid molecular compounds that consist of photochromic nitro-substituted and halogenated spiropyran derivatives bonded to the surface of the [60]fullerene cage through the pyrrolidine bridge were investigated using various functionals and basis sets of TD-DFT and semiempirical quantum-chemical approaches. The role of nπ* states formed by the lone pairs of substituents in changing of the electronic structure and photochromic properties of spiropyran derivatives was evaluated. The Sππ(spiropyran) → intermediate nπ* states → Sππ(merocyanine) channel for phototransformation of the hybrid compound containing a nitro-substituted spiropyran moiety was established and compared with similar systems of halogenated spiropyrans attached to the [60]fullerene bulk where photoinduced isomerization does not process due to high probability of internal conversion from the excited electronic state localized on the spiropyran fragment to the states of the pyrrolidino[60]fullerene.
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Affiliation(s)
- Vladimir A Pomogaev
- Tomsk State University , 36 Lenin Prospekt, Tomsk 634050, Russian Federation
| | - Valery A Barachevsky
- Photochemistry Center, Federal Science-Study Center (FSSC) "Crystallography and Photonics" of RAS, 7a, bld.1 , Novatorov Str., Moscow 108840, Russian Federation
| | - Airat R Tuktarov
- Institute of Petrochemistry and Catalysis of RAS , 141, Prospekt Oktyabrya, Ufa 450075, Russian Federation
| | - Pavel V Avramov
- Department of Chemistry and Green-Nano Materials Research Center, College of Natural Sciences, Kyungpook National University 1370 Sankyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea
| | - Victor Ya Artyukhov
- Tomsk State University , 36 Lenin Prospekt, Tomsk 634050, Russian Federation
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24
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Sanz García J, Maschietto F, Campetella M, Ciofini I. Using Density Based Indexes and Wave Function Methods for the Description of Excited States: Excited State Proton Transfer Reactions as a Test Case. J Phys Chem A 2018; 122:375-382. [DOI: 10.1021/acs.jpca.7b10033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Juan Sanz García
- Chimie ParisTech, PSL Research
University, CNRS, Institut de Recherche de Chimie Paris, F-75005 Paris, France
| | - Federica Maschietto
- Chimie ParisTech, PSL Research
University, CNRS, Institut de Recherche de Chimie Paris, F-75005 Paris, France
| | - Marco Campetella
- Chimie ParisTech, PSL Research
University, CNRS, Institut de Recherche de Chimie Paris, F-75005 Paris, France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL Research
University, CNRS, Institut de Recherche de Chimie Paris, F-75005 Paris, France
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25
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Savarese M, Guido CA, Brémond E, Ciofini I, Adamo C. Metrics for Molecular Electronic Excitations: A Comparison between Orbital- and Density-Based Descriptors. J Phys Chem A 2017; 121:7543-7549. [DOI: 10.1021/acs.jpca.7b07080] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marika Savarese
- CompuNet, Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genoa, Italy
| | - Ciro Achille Guido
- Laboratoire CEISAM−UMR CNRS 6230, Université de Nantes, 2 Rue de la Houssinière, 44322 Nantes Cedex 3, France
| | - Eric Brémond
- CompuNet, Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genoa, Italy
| | - Ilaria Ciofini
- Chimie ParisTech, PSL Research University, CNRS,
Institut de Recherche de Chimie Paris, F-75005 Paris, France
| | - Carlo Adamo
- Chimie ParisTech, PSL Research University, CNRS,
Institut de Recherche de Chimie Paris, F-75005 Paris, France
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26
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Li Y, Chu TS. DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer. J Phys Chem A 2017. [DOI: 10.1021/acs.jpca.7b02606] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yang Li
- State Key Laboratory
of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Tian-Shu Chu
- State Key Laboratory
of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- Institute for Computational Sciences and
Engineering, Laboratory of New Fiber Material and Modern Textile,
the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, P. R. China
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27
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Escudero D. Revising Intramolecular Photoinduced Electron Transfer (PET) from First-Principles. Acc Chem Res 2016; 49:1816-24. [PMID: 27575871 DOI: 10.1021/acs.accounts.6b00299] [Citation(s) in RCA: 163] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Photoinduced electron transfer (PET) plays relevant roles in many areas of chemistry, including charge separation processes in photovoltaics, natural and artificial photosynthesis, and photoluminescence sensors and switches. As in many other photochemical scenarios, the structural and energetic factors play relevant roles in determining the rates and efficiencies of PET and its competitive photodeactivation processes. Particularly, in the field of fluorescent sensors and switches, intramolecular PET is believed (in many cases without compelling experimental proof) to be responsible of the quench of fluorescence. There is an increasing experimental interest in fluorophore's molecular design and on achieving optimal excitation/emission spectra, excitation coefficients, and fluorescence quantum yields (importantly for bioimaging purposes), but less efforts are devoted to fundamental mechanistic studies. In this Account, I revise the origins of the fluorescence quenching in some of these systems with state-of-the-art quantum chemical tools. These studies go beyond the common strategy of analyzing frontier orbital energy diagrams and performing PET thermodynamics calculations. Instead, the potential energy surfaces (PESs) of the lowest-lying excited states are explored with time-dependent density functional theory (TD-DFT) and complete active space self-consistent field (CASSCF) calculations and the radiative and nonradiative decay rates from the involved excited states are computed from first-principles using a thermal vibration correlation function formalism. With such a strategy, this work reveals the real origins of the fluorescence quenching, herein entitled as dark-state quenching. Dark states (those that do not absorb or emit light) are often elusive to experiments and thus, computational investigations can provide novel insights into the actual photodeactivation mechanisms. The success of the dark-state quenching mechanism is demonstrated for a wide variety of fluorescent probes, including proton, cation and anion targets. Furthermore, this mechanism provides a general picture of the fluorescence quenching which englobes intramolecular charge-transfer (ICT), ratiometric quenching, and those radiationless mechanisms believed to be originated by PET. Finally, this Account provides for the first time a computational protocol to quantitatively estimate this phenomenon and provides the ingredients for the optimal design of fluorescent probes from first principles.
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Affiliation(s)
- Daniel Escudero
- CEISAM UMR CNRS
6230, Université de Nantes, 2 rue de la Houssinière, BP 92208, 44322 Cedex 3 Nantes, France
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28
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Savarese M, Raucci U, Netti PA, Adamo C, Rega N, Ciofini I. A qualitative model to identify non-radiative decay channels: the spiropyran as case study. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1966-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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29
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30
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Savarese M, Brémond É, Adamo C, Rega N, Ciofini I. Excited-State Proton Transfer and Intramolecular Charge Transfer in 1,3-Diketone Molecules. Chemphyschem 2016; 17:1530-8. [DOI: 10.1002/cphc.201500908] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Marika Savarese
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Éric Brémond
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Carlo Adamo
- CompuNet; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- Institut de Recherche de Chimie Paris IRCP; CNRS-Chimie ParisTech, PSL Research University; 11 rue Pierre et Marie Curie 75005 Paris France
- Institut Universitaire de France; 103 Boulevard Saint Michel 75005 Paris France
| | - Nadia Rega
- Dipartimento di Scienze Chimiche; Università di Napoli 'Federico II', Complesso Universitario di M.S.Angelo; via Cintia 80126 Napoli Italy
- Italian Institute of Technology; IIT@CRIB Center for Advanced Biomaterials for Healthcare; Largo Barsanti e Matteucci 80125 Napoli Italy
| | - Ilaria Ciofini
- Institut de Recherche de Chimie Paris IRCP; CNRS-Chimie ParisTech, PSL Research University; 11 rue Pierre et Marie Curie 75005 Paris France
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31
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Dondaine L, Escudero D, Ali M, Richard P, Denat F, Bettaieb A, Le Gendre P, Paul C, Jacquemin D, Goze C, Bodio E. Coumarin-Phosphine-Based Smart Probes for Tracking Biologically Relevant Metal Complexes: From Theoretical to Biological Investigations. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501304] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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32
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Riaz U, Ashraf SM, Kumar Saroj S, Zeeshan M, Jadoun S. Microwave-assisted solid state intercalation of Rhodamine B and polycarbazole in bentonite clay interlayer space: structural characterization and photophysics of double intercalation. RSC Adv 2016. [DOI: 10.1039/c5ra27387k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intercalation of organic moieties in layered double hydroxides/clays has been used to obtain various hybrid compounds with enhanced properties and wide ranging applications.
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Affiliation(s)
- Ufana Riaz
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi-110025
- India
| | - S. M. Ashraf
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi-110025
- India
| | - Sanjay Kumar Saroj
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi-110025
- India
| | - Mohd Zeeshan
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi-110025
- India
| | - Sapana Jadoun
- Materials Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia (A Central University)
- New Delhi-110025
- India
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33
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Sabatini RP, Mark MF, Mark DJ, Kryman MW, Hill JE, Brennessel WW, Detty MR, Eisenberg R, McCamant DW. A comparative study of the photophysics of phenyl, thienyl, and chalcogen substituted rhodamine dyes. Photochem Photobiol Sci 2016; 15:1417-1432. [DOI: 10.1039/c6pp00233a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We characterize the ultrafast photophysics and electrochemistry of a collection of rhodamine-style dyes and show that different dyes exhibit various directions of charge-transfer in the excited state.
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Affiliation(s)
| | | | - Daniel J. Mark
- Department of Chemistry
- University of Rochester
- Rochester
- USA
| | - Mark W. Kryman
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo
- USA
| | - Jacqueline E. Hill
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo
- USA
| | | | - Michael R. Detty
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo
- USA
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34
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Adamo C, Le Bahers T, Savarese M, Wilbraham L, García G, Fukuda R, Ehara M, Rega N, Ciofini I. Exploring excited states using Time Dependent Density Functional Theory and density-based indexes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.027] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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35
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Savarese M, Brémond É, Antonov L, Ciofini I, Adamo C. Computational Insights into Excited-State Proton-Transfer Reactions in Azo and Azomethine Dyes. Chemphyschem 2015; 16:3966-73. [PMID: 26441214 DOI: 10.1002/cphc.201500589] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/12/2015] [Indexed: 11/11/2022]
Abstract
State of the art density functional theory approaches are employed to provide an accurate description of the photophysical properties of azodyes and Schiff bases displaying intramolecular hydrogen-bonding features. These compounds exist as tautomeric mixtures at the ground state and, in the case of Schiff bases, an excited-state intramolecular proton transfer (ESIPT) occurs upon excitation. The experimentally observed photophysical properties are discussed here in light of the theoretical findings. To rationalize the different experimentally observed radiative behavior of the azo and azomethine structures, a nonradiative decay pathway that is possibly active in such systems is determined. The characterization of this deactivation path, tested for two related compounds exhibiting different fluorescence quantum yields, enables us to disentangle the different and contrasting effects governing the excited-state behavior of these molecular systems.
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Affiliation(s)
- Marika Savarese
- CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy.
| | - Éric Brémond
- CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy
| | - Liudmil Antonov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 9, 1113, Sofia, Bulgaria
| | - Ilaria Ciofini
- PSL Research University, Institut de Recherche de Chimie Paris IRCP, CNRS-Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Carlo Adamo
- CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy. .,PSL Research University, Institut de Recherche de Chimie Paris IRCP, CNRS-Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005, Paris, France. .,Institut Universitaire de France, 103 Boulevard Saint Michel, 75005, Paris, France.
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36
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Raucci U, Savarese M, Adamo C, Ciofini I, Rega N. Intrinsic and Dynamical Reaction Pathways of an Excited State Proton Transfer. J Phys Chem B 2015; 119:2650-7. [DOI: 10.1021/jp508947f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Umberto Raucci
- Dipartimento
di Scienze Chimiche, Universitá di Napoli ’Federico II’, Complesso Universitario di M.S.Angelo, via Cintia, I-80126 Napoli, Italy
| | - Marika Savarese
- Dipartimento
di Scienze Chimiche, Universitá di Napoli ’Federico II’, Complesso Universitario di M.S.Angelo, via Cintia, I-80126 Napoli, Italy
- IIT@CRIB
Center for Advanced Biomaterials for Healthcare, Italian Institute of Technology, Largo Barsanti e Matteucci, I-80125 Napoli, Italy
| | - Carlo Adamo
- Laboratoire
d’Electrochimie, Chimie des Interfaces et Modelisation pour
l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, Chimie ParisTech, 11 rue P. et M. Curie, F-75231 Paris Cedex 05, France
- Institut Universitaire de France, 103 Bd Saint-Michel, F-75005 Paris, France
| | - Ilaria Ciofini
- Laboratoire
d’Electrochimie, Chimie des Interfaces et Modelisation pour
l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, Chimie ParisTech, 11 rue P. et M. Curie, F-75231 Paris Cedex 05, France
| | - Nadia Rega
- Dipartimento
di Scienze Chimiche, Universitá di Napoli ’Federico II’, Complesso Universitario di M.S.Angelo, via Cintia, I-80126 Napoli, Italy
- IIT@CRIB
Center for Advanced Biomaterials for Healthcare, Italian Institute of Technology, Largo Barsanti e Matteucci, I-80125 Napoli, Italy
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37
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Wilbraham L, Savarese M, Rega N, Adamo C, Ciofini I. Describing excited state intramolecular proton transfer in dual emissive systems: a density functional theory based analysis. J Phys Chem B 2014; 119:2459-66. [PMID: 25208048 DOI: 10.1021/jp507425x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The excited state intramolecular proton transfer (ESIPT) reaction taking place within 2-(2-hydroxyphenyl)benzoxazole (HBT) and two recently experimentally characterized napthalimide derivatives-known as N-1 and N-4-has been investigated in order to identify and test a possible protocol for the description and complete mechanistic and electronic characterization of the reaction at the excited state. This protocol is based on density functional theory, time-dependent density functional theory, and a recently proposed electron density based index (DCT). This method is able to identify all stable species involved in the reaction, discriminate between possible reaction pathways over potential energy surfaces (PES), which are intrinsically very flat and difficult to characterize, and quantitatively measure the excited state charge transfer character throughout the reaction. The photophysical properties of the molecules (i.e., absorption and emission wavelength) are also quantitatively determined via the implicit inclusion of solvent effects in the case of toluene and, the more polar, tetrahydrofuran. The accuracy obtained with this protocol then opens up the possibility of the ab initio design of molecules exhibiting ESIPT for tailored applications such as highly selective molecular sensors.
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Affiliation(s)
- Liam Wilbraham
- Institut de Recherche de Chimie Paris IRCP, CNRS-Chimie ParisTech, PSL Research University , 11 Rue Pierre et Marie Curie, F-75005 Paris, France
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38
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Modeling of charge transfer processes to understand photophysical signatures: The case of Rhodamine 110. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.07.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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