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Development and Applications of Novel Photoelectric Nanomaterials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (14 August 2023) | Viewed by 1787

Special Issue Editor


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Guest Editor
School of Material Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Interests: photo(electro)catalysis; quantum dots; single atom catalysis; MXene; carbon nanomaterials

Special Issue Information

Dear Colleagues,

The engine of modern global economy is primarily powered by fossil fuels. However, fossil fuels are exhaustible, and their combustion has led to severe environmental issues and energy crisis. It is an urgent obligation to develop alternative and sustainable energy resources to overcome these challenges. Recently, various advanced photoelectronic nanomaterials, including single atom (metals or nonmetal) catalysts, quantum dots (graphene quantum dots, carbon dots, etc.), porous materials (MOFs, COFs, CPPs, etc.) have attracted tremendous interest for many photoelectrochemical reactions towards energy conversion and storage because of the high tunability of their electronic states through tailoring the coordination environment. However, it remains a great challenge to fabricate advanced photoelectronic nanomaterials with high stability, large production and clear reaction mechanisms, and to obtain practical and value-added products. Therefore, it is necessary to focus on novel photoelectronic nanomaterials, advanced characterization techniques, and advantages of their photoelectronic applications. The present Special Issue on “Development and Applications of Novel Photoelectric Nanomaterials” may become a status report summarizing the progress achieved in recent years.

Dr. Zhiping Zeng
Guest Editor

Manuscript Submission Information

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Keywords

  • advanced photoelectronic nanomaterials
  • single atom (metals or nonmetal) catalysts
  • quantum dots (graphene quantum dots, carbon dots, etc.)
  • porous materials (MOFs, COFs, CPPs, etc.)
  • novel photoelectronic nanomaterials
  • advanced characterization techniques
  • photoelectronic applications

Published Papers (1 paper)

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Research

21 pages, 13569 KiB  
Article
Physical Mechanism of One-Photon Absorption, Two-Photon Absorption, and Electron Circular Dichroism of 1,3,5 Triazine Derivatives Based on Molecular Planarity
by Xiangtao Chen, Xiaoyan Shi, Fuming Yang, Xiqing Zhang, Rui Dai, Yan Jia, Ningte Yan, Sixuan Li, Zihan Wang and Zhongzhu Liang
Molecules 2023, 28(12), 4700; https://doi.org/10.3390/molecules28124700 - 11 Jun 2023
Cited by 2 | Viewed by 1572
Abstract
We provide a method to regulate intramolecular charge transfer (ICT) through distorting fragment dipole moments based on molecular planarity and intuitively investigate the physical mechanisms of one-photon absorption (OPA), two-photon absorption (TPA), and electron circular dichroism (ECD) properties of the multichain 1,3,5 triazine [...] Read more.
We provide a method to regulate intramolecular charge transfer (ICT) through distorting fragment dipole moments based on molecular planarity and intuitively investigate the physical mechanisms of one-photon absorption (OPA), two-photon absorption (TPA), and electron circular dichroism (ECD) properties of the multichain 1,3,5 triazine derivatives o-Br-TRZ, m-Br-TRZ, and p-Br-TRZ containing three bromobiphenyl units. As the position of the C–Br bond on the branch chain becomes farther away, the molecular planarity is weakened, with the position of charge transfer (CT) on the branch chain of bromobiphenyl changing. The excitation energy of the excited states decreases, which leads to the redshift of the OPA spectrum of 1,3,5-triazine derivatives. The decrease in molecular plane results in a change in the magnitude and direction of the molecular dipole moment on the bromobiphenyl branch chain, which weakens the intramolecular electrostatic interaction of bromobiphenyl branch chain 1,3,5-triazine derivatives and weakens the charge transfer excitation of the second step transition in TPA, leading to an increase in the enhanced absorption cross-section. Furthermore, molecular planarity can also induce and regulate chiral optical activity through changing the direction of the transition magnetic dipole moment. Our visualization method helps to reveal the physical mechanism of TPA cross-sections generated via third-order nonlinear optical materials in photoinduced CT, which is of great significance for the design of large TPA molecules. Full article
(This article belongs to the Special Issue Development and Applications of Novel Photoelectric Nanomaterials)
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