Article
Chemistry, Physical
Yu Li, Yaxing Lan, Xuming Zheng, Yanying Zhao
Summary: In this study, the efficiency and applicability of Raman spectroscopy (RS) were proposed for the direct observation and characterization of transient species, as well as the monitoring of excited-state proton transfer reaction mediated by different excitation wavelength. The aim is to enhance the understanding of the photochemical reactivity of organic compounds containing C=S and S-H groups.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Chattarika Sukpattanacharoen, Nawee Kungwan
Summary: The theoretical investigation on the effect of polar solvents on 2-aryl-3-hydroxyquinolone (3HQ) revealed different emission peaks related to different conformations, with intramolecular PT processes possible for Intra-HB conformers and intermolecular double PT processes possible for Inter-HB conformers. The mechanisms of excited-state intermolecular double PT processes for 3HQ(CH3OH)-inter and 3HQ(H2O)-inter conformers were judged to be stepwise based on the time lag between the first and second proton transfers.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Junhan Xie, Ziyu Wang, Ruixue Zhu, Jiaming Jiang, Tsu-Chien Weng, Yi Ren, Shuhua Han, Yifan Huang, Weimin Liu
Summary: In this study, a bis-benzimidazole derivative (BBM) molecule consisting of two 2-(2 '-hydroxyphenyl) benzimidazole (HBI) halves was synthesized and used as a ratiometric fluorescence sensor for sensitive detection of Cu2+ based on enol-keto excited-state intramolecular proton transfer (ESIPT). The primary photodynamics of the BBM molecule were investigated using femtosecond stimulated Raman spectroscopy, time-resolved electronic spectroscopies, and quantum chemical calculations. The results showed that ESIPT occurred only in one of the HBI halves with a time constant of 300 fs, followed by rotation of the dihedral angle between the two HBI halves and generation of a planarized BBM-keto* isomer in 3 ps, resulting in a dynamic redshift of BBM-keto* emission.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Spectroscopy
Xing Su, Qiao Zhou, You Li, Bifa Cao, Bo Li, Xin Zhang, Hang Yin, Ying Shi
Summary: The spectroscopic properties of a new compound were investigated, suggesting the feasibility of excited-state intramolecular proton transfer toward the N center. Calculations showed that the proton transfer from the -OH group to the aldehyde group is possible under certain conditions, providing theoretical support for further research in this novel direction.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Rusrina Salaeh, Rathawat Daengngern
Summary: The ultrafast proton transfer process in the excited state of 7-(2 '-pyridyl)indole has been investigated using dynamics simulations. The simulations reveal the occurrence of intramolecular and intermolecular proton transfers in different solvent environments. The intermolecular proton transfer process is found to be faster than the intramolecular process, which may be attributed to the competition between intramolecular and intermolecular hydrogen bonding. Additionally, the initiation of conical intersection is observed after the proton transfer process.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Biochemistry & Molecular Biology
Joanna Jankowska, Andrzej L. Sobolewski
Summary: The excited-state intramolecular proton transfer (ESIPT) phenomenon plays a crucial role in many photobiological and photochemical processes, with extremely fast transformation occurring at sub-100 fs timescales. Theoretical and experimental studies are essential for understanding the mechanism of ESIPT.
Article
Chemistry, Physical
Xue-fang Yu, Ting-he Fu, Bo Xiao, Hong-yuan Yu, Qingzhong Li
Summary: The study reveals that the deformation of double bonds in A and 5FU can affect the excited-state decay paths of the A-5FU dimer, competing with proton transfer paths and influencing the photostability of DNA base pairs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Yunfan Yang, Lujia Yang, Fengcai Ma, Yongqing Li, Yue Qiu
Summary: Inspired by the activity-based sensing method, a hydrazine-modified naphthalene derivative (Naph1) was synthesized and used as a fluorescent probe for formaldehyde (FA) detection in living cells. The probe Naph1 showed a 14-fold enhancement of fluorescent signal around 510 nm, indicating high selectivity and sensitivity for FA detection. The sensing mechanism was further explored using theoretical calculations and simulations, revealing the importance of excited-state intramolecular proton transfer (ESIPT) for the light-up fluorescent detection of FA.
Review
Biochemistry & Molecular Biology
Hem C. Joshi, Liudmil Antonov
Summary: Excited-state intramolecular proton transfer (ESIPT) has become an attractive research field with various aspects such as excitation wavelength dependence, anti-Kasha ESIPT, fast and slow ESIPT, reversibility and irreversibility, hydrogen bonding, and geometrical factors. Studies also involve excited-state double proton transfer (ESDPT) mechanisms including concerted and stepwise processes.
Article
Chemistry, Physical
Lukasz Pajchel, Leszek Borkowski
Summary: Fluoride-substituted apatites and hydroxyapatite were synthesized using the sol-gel method and calcined at different temperatures, revealing that the fluoride-substituted apatites were thermally stable but contained OH- groups. Characterization methods showed that the obtained materials had crystals with a shape similar to that of biological apatite.
Review
Chemistry, Multidisciplinary
Luis F. B. Fontes, Joao Rocha, Artur M. S. Silva, Samuel Guieu
Summary: The effective utilization of luminescent dyes requires a comprehensive understanding of their excitation and relaxation pathways, including Excited-State Proton Transfer (ESPT). Experimental demonstration of ESPT can be challenging due to competing phenomena. A holistic approach, integrating experimental results, computational analysis, and diverse mechanism assessment, is crucial for verifying the occurrence of ESPT.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Heyao Yuan, Peng Zhang, Hongbin Zhan, Hengwei Zhang, Xiaozhu Sun, Yi Wang, Hongjun Zhang
Summary: This study investigates the mechanism of probe L and derivative L-HK in detecting Cys. The infrared vibration spectrum, geometric parameters, and interaction region indicator (IRI) isosurface provide evidence that hydrogen bond enhancement in the excited state benefits excited state intramolecular proton transfer (ESIPT). The potential energy curve (PEC) shows that L-HK undergoes an ultra-fast ESIPT process, resulting in a single fluorescence emission. Furthermore, the frontier molecular orbitals (FMOs) confirm the intramolecular charge transfer (ICT) process. The quenching mechanism of probe L is explored by calculating the reorganization energy.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Piotr Kabacinski, Pietro Marabotti, Daniele Fazzi, Vasilis Petropoulos, Andrea Iudica, Patrick Serafini, Giulio Cerullo, Carlo S. S. Casari, Margherita Zavelani-Rossi
Summary: Investigated the photophysics of one-dimensional linear nanostructures and revealed their excellent mechanical, thermal, and electronic properties. Studied the excited state relaxation processes using experimental and computational methods, providing important insights into photoinduced events in low-dimensional carbon-based materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Catia I. C. Esteves, Luis F. B. Fontes, A. Filipa N. Borges, Joao Rocha, Artur M. S. Silva, Samuel Guieu
Summary: It is discovered that 2'-aminochalcones with a strong push-pull character exhibit dual emission due to the Excited State Intramolecular Proton Transfer (ESIPT) between ketoenamine and enol-imine tautomers. The strength of hydrogen bonds is correlated with the tautomerization energy gap, depending on the electron donating or electron withdrawing group on the amine.
Article
Chemistry, Applied
Jie Ma, Jinlong Li, Rui Yang, Weijian Xue, Qingxia Wang, Shenmiao Li
Summary: The study revealed that N-1 to N-5 exhibit significantly red-shifted UV-vis absorption and emission properties, with N-1 demonstrating dual emission, confirming their ESIPT characteristics. All compounds generated triplet excited states, with N-3 and N-4 showing longer triplet excited state lifetimes and higher photooxidative abilities than the other compounds.
Article
Chemistry, Physical
Sirui Yang, Chen Cao, Jiayu Li, Ziqi Deng, Shaofei Ni, Jing-Xin Jian, Qing-Xiao Tong, Li Dang, Ming-De Li
Summary: Charge transfer plays a crucial role in photophysical and photochemical reactions, but the factors influencing the excited charge transfer state are not well understood yet. In this study, the dynamics of intramolecular charge transfer and charge recombination in donor-pi-acceptor systems are manipulated through molecular torsion, leading to different lifetimes of charge transfer and charge recombination processes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Chengyu Liang, Liwei Cheng, Shitong Zhang, Sirui Yang, Wei Liu, Jian Xie, Ming-De Li, Zhifang Chai, Yaxing Wang, Shuao Wang
Summary: In this study, it was found that exciton behaviors in metal-organic frameworks (MOFs) can be regulated by framework-guest interactions. Incorporating electron-deficient molecules into the pores of semiconductive MOFs resulted in efficient energy transfer and distinctive exciton type conversion, improving the optoelectronic performance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Ziqi Deng, Lan Li, Han Jia, Nga-Fong Li, Jiaxing He, Ming-De Li, David Lee Phillips, Ying Li
Summary: The photodynamics of different halogen-substituted MG derivatives and their corresponding FAP-MG complexes were studied using femtosecond transient absorption spectroscopy and theoretical computations. The results showed that FAP binding restricts the rotation of MG, leading to longer excited state lifetimes and enhanced fluorescence emission and singlet oxygen generation. This study will contribute to the development of advanced FAP-MG systems with high spatiotemporal resolution.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Multidisciplinary Sciences
Renxian Gao, Yonglin He, Dumeng Zhang, Guoya Sun, Jia-Xing He, Jian-Feng Li, Ming-De Li, Zhilin Yang
Summary: Nano-optomechanical systems with gigahertz acoustic vibration are essential for all-optical manipulation, quantum control, on-chip data processing, and optomechanical sensing. In this study, a high-quality 5 GHz optoacoustic vibration and ultrafast optomechanical all-optical manipulation were demonstrated in a sub-5 nm tip-supported nano-optomechanical metasurface (TSNOMS). The design of a semi-suspended metasurface enhances the optical energy input and reduces mechanical and thermal losses, resulting in improved conversion efficiency and oscillation quality.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Ye-Tao Chen, Ming-Peng Zhuo, Xinyi Wen, Wenbin Chen, Ke-Qin Zhang, Ming-De Li
Summary: Organic photothermal cocrystals, which combine the advantages of organic cocrystals and photothermal conversion ability, have attracted a lot of attention in various fields such as photoacoustic imaging, seawater desalination, and photothermal therapy. However, there is still a lack of systematic investigation into the photothermal conversion mechanisms of these cocrystals, posing a challenge for further developments. Therefore, it is crucial to explore the rational design and synthesis of high-performance organic photothermal cocrystals for future applications. This review provides a comprehensive summary of the molecular classification, photothermal conversion mechanisms, and applications of organic photothermal cocrystals.
Article
Engineering, Environmental
Wenbin Chen, Fanwei Ye, Zicong Situ, Jiahong Xu, Xiaolong Lu, Hefeng Zhang, Shun -Li Chen, Zhengya Dong, Li Dang, Ming -De Li
Summary: In this work, a strategy was demonstrated to conveniently characterize and monitor the optical changes during the amorphous-to-crystalline phase transition (ACPT) for organic solid-state luminescent (OSL) materials using a nanoparticle suspension (NPs). The ACPT process of the OSL materials can be manipulated by factors such as temperature, NPs concentration and size, inorganic electrolyte, and surfactant. This versatile manipulation of the ACPT in OLS nanomaterials can lead to the realization of continuous tunable luminous color by a single component material, with potential applications in anti-counterfeiting ink, photodynamic therapy, and other optical fields.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Wei Zhang, Dengfeng Luo, Shao-Fei Ni, Shunli Chen, Limei Cha, Ming-De Li, Li Dang
Summary: The combination of inorganic perovskite and graphene oxide has been shown to be an effective method for achieving excellent optical and electrical properties. In this study, CsPbBr3 nanocrystals were loaded onto graphene oxide to form GO-CsPbBr3 nanocomposites. The results revealed that GO could significantly quench the luminescence of CsPbBr3 nanocrystals, potentially due to the fast separation and transfer of photogenerated charge carriers. Additionally, GO could greatly enhance the photocurrent intensity, making it a promising material for photocatalysis.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Chen Zhou, Guanheng Huang, Yaohui Liang, Bingjia Xu, Amjad Islam, Shunli Chen, Shaofei Ni, Li Dang, Ming-De Li
Summary: In a host-guest system, the space through charge transfer and long-range charge transport between α-cyclodextrin and diphenylacetylene and its derivatives induce ultralong room temperature phosphorescence and thermally activated delayed fluorescence emission. The charge transfer process plays a crucial role in regulating the lifetime and color of afterglow emission. The host-guest complexes, readily fabricated by self-assembly, show potential applications in rewritable ink, anti-counterfeiting, and information encryption due to their multiple color and lifetime as well as the switch property of afterglow emission control.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Junhong Pang, Jiaxing He, Ziqi Deng, Wenbin Chen, Shunli Chen, Shaofei Ni, David Lee Phillips, Zhengya Dong, Li Dang, Ming-De Li
Summary: In this study, the relationship between double-bond photoswitching molecules and photoisomerization kinetics in solution phase and nanocrystal suspensions (NCS) was investigated by studying the excited-state evolutions of trans-azobenzene (AB), trans-stilbene (TS), and N-benzylideneaniline (NBA). It was found that NBA exhibited the fastest photoisomerization rate in the solution phase due to its single-bond feature. The crystal configuration in NCS accelerated the photoisomerization rates of AB and TS compared to the solution phase, while NBA showed a distorted structure in NCS, opening the intersystem crossing channel instead of photoisomerization. Therefore, the study highlights the importance of crystal configuration and molecular structure in determining the photophysical properties of photoswitching materials.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jian-Gong Yang, Xingyu Feng, Nengquan Li, Jiayu Li, Xiu-Fang Song, Ming -De Li, Ganglong Cui, Jingling Zhang, Chenglin Jiang, Chuluo Yang, Kai Li
Summary: In this study, a design of TADF Pd(II) complexes featuring metal-perturbed intraligand charge-transfer excited states is described, and two orange- and red-emitting complexes with high efficiencies and short lifetimes have been developed. OLEDs using these Pd(II) complexes show exceptional external quantum efficiencies and operational stability.
Article
Chemistry, Multidisciplinary
Shun-Ze Zhan, Yu-Li Liu, Hong Cai, Ming-De Li, Qibin Huang, Xu-Dong Wang, Mian Li, Li Dang, Seik Weng Ng, Weigang Lu, Dan Li
Summary: In this study, the first coordination-saturated buckyball with a C60 molecule fully encapsulated in a Cu30 cluster was realized, demonstrating its unique optical properties and high photothermal conversion efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jiayu Li, Sirui Yang, Ziqi Deng, Amjad Islam, Shiqi Wu, Jiaxing He, Shaofei Ni, Li Dang, Ming-De Li
Summary: Photofunctional materials based on donor-acceptor molecules have unique optical properties and have attracted significant attention. This study investigates the effect of substitution positions on the excited-state evolution channels of donor-acceptor molecules by designing different regioisomeric dyads.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Zi-Gang Lu, Wenbin Chen, David Lee Phillips, Ming-De Li
Summary: In this study, blebbistatin derivatives with various electronic characteristic leaving groups were synthesized and studied to unveil the photocleavage mechanism(s) and the tunable effect of the leaving groups. The results provide a structure-property relationship that allows for rational selection of protected groups in molecules for specific applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Wei Peng, Yao-Hui Wang, Jiaxing He, Jing-Liang Yang, Jingyu Wang, Petar M. Radjenovic, Jia-Sheng Lin, Zhilin Yang, Ming-De Li, Fan-Li Zhang, Yue-Jiao Zhang, Jun Yi, Jian-Feng Li
Summary: Realizing the dual emission of fluorescence-phosphorescence in a single system has significant implications for biological imaging, sensing, and information encryption. In this study, we successfully enhanced the dark phosphorescence processes by coupling singlet-triplet molecular emitters with a plasmonic cavity, leading to selectable emission wavelengths in a broad range of spectra.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Fanwei Ye, Wenbin Chen, Ziqi Deng, Shun-Li Chen, Zhengya Dong, Li Dang, Ming-De Li
Summary: The poor water solubility of organic UV filters in sunscreen cosmetics is a common problem. This study prepared nanoparticles of diethylamino hydroxybenzoyl hexyl benzoate (DHHB), a popular organic UVA filter, in order to improve its water solubility. By utilizing surfactants as stabilizers, the surfactant-stabilized nanoparticles of DHHB showed similar performance in terms of ultrafast excited-state relaxation compared to its solution phase. The nanoparticles also exhibited enhanced stability and water solubility, making them an effective method for improving the properties of organic UV filters.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
