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Molecules
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Study on Synthesis and Photochemistry of Dyes
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Study on Synthesis and Photochemistry of Dyes

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

Deadline for manuscript submissions: 31 July 2024 | Viewed by 1832

Special Issue Editor

Dr. Liang Han

E-Mail Website
Guest Editor
School of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
Interests: organic chemistry; syntheses; fine chemicals; functional dyes; sensitizing dyes

Special Issue Information

Dear Colleagues,

Dyes are widely used in the textile, pharmaceutical, food, cosmetics, plastics, paint, ink, photographic and paper industries. Moreover, the traditional dyes have been developed into functional dyes, which can be further used in semiconductors, photosensitizers, emitters in optoelectronics devices, optical and luminescent sensors for biological and environmental monitoring systems, and therapeutic agents for medical purposes, and so on.

Dye’s characteristics are closely related to their photochemical properties, which has been investigated thoroughly. For example, dyes with photon absorption/emission at distinct wavelengths can be used as the industrial colorants or potential optical signal indicators in chemosensors; dyes with white-light emission are used in solid-state lighting, flat-panel display devices, and backlights for liquid crystalline display; dyes with the ability to produce singlet oxygen under light irradiation can be used for photodynamic therapy (PDT); dyes are used as the photosensitizers in dye-sensitized solar cells (DSSCs) for their abilities of photoexcitation and electron injection. On the other hand, dye properties are further optimized through the modification of molecular structures, which is promoted by the organic synthesis.

This Special Issue entitled “Study on Synthesis and Photochemistry of Dyes” welcomes manuscripts (original research papers, short communications, or focus reviews) pointed out by the keywords given below. However, other related topics are also welcome.

Dr. Liang Han
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • synthesis of dyes
  • photochemistry of dyes
  • organic dyes
  • functional organic dyes
  • photo-inducing materials
  • organic photoelectric materials

Published Papers (2 papers)

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Research

15 pages, 7230 KiB  
Article
Degradation of Orange G Using PMS Triggered by NH2-MIL-101(Fe): An Amino-Functionalized Metal–Organic Framework
by Lijie Mo, Guangzhou Chen and Hua Wang
Molecules 2024, 29(7), 1488; https://doi.org/10.3390/molecules29071488 - 27 Mar 2024
Viewed by 436
Abstract
As an azo dye, OG has toxic and harmful effects on ecosystems. Therefore, there is an urgent need to develop a green, environmentally friendly, and efficient catalyst to activate peroxymonosulfate (PMS) for the degradation of OG. In this study, the catalysts MIL-101(Fe) and [...] Read more.
As an azo dye, OG has toxic and harmful effects on ecosystems. Therefore, there is an urgent need to develop a green, environmentally friendly, and efficient catalyst to activate peroxymonosulfate (PMS) for the degradation of OG. In this study, the catalysts MIL-101(Fe) and NH2-MIL-101(Fe) were prepared using a solvothermal method to carry out degradation experiments. They were characterized by means of XRD, SEM, XPS, and FT-IR, and the results showed that the catalysts were successfully prepared. Then, a catalyst/PMS system was constructed, and the effects of different reaction systems, initial pH, temperature, catalyst dosing, PMS concentration, and the anion effect on the degradation of OG were investigated. Under specific conditions (100 mL OG solution with a concentration of 50 mg/L, pH = 7.3, temperature = 25 °C, 1 mL PMS solution with a concentration of 100 mmol/L, and a catalyst dosage of 0.02 g), the degradation of OG with MIL-101(Fe) was only 36.6% within 60 min; as a comparison, NH2-MIL-101(Fe) could reach up to 97.9%, with a reaction constant k value of 0.07245 min−1. The NH2-MIL-101 (Fe)/PMS reaction system was able to achieve efficient degradation of OG at different pH values (pH = 3~9). The degradation mechanism was analyzed using free-radical quenching tests. The free-radical quenching tests showed that SO4•−, •OH, and 1O2 were the main active species during the degradation of OG. Full article
(This article belongs to the Special Issue Study on Synthesis and Photochemistry of Dyes)
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13 pages, 4205 KiB  
Article
A High Crystalline Perylene-Based Hydrogen-Bonded Organic Framework for Enhanced Photocatalytic H2O2 Evolution
by Mengke Hu, Chenxi Wu, Shufan Feng and Jianli Hua
Molecules 2023, 28(19), 6850; https://doi.org/10.3390/molecules28196850 - 28 Sep 2023
Cited by 2 | Viewed by 1102
Abstract
Hydrogen-bonded organic frameworks (HOFs) are a kind of crystalline porous material that have shown great potential for photocatalysis on account of their mild synthesis conditions and high crystallinity. Perylene-based photocatalysts have great potential for photocatalytic H2O2 production due to their [...] Read more.
Hydrogen-bonded organic frameworks (HOFs) are a kind of crystalline porous material that have shown great potential for photocatalysis on account of their mild synthesis conditions and high crystallinity. Perylene-based photocatalysts have great potential for photocatalytic H2O2 production due to their excellent photochemical stability and broad spectral absorption. In this work, we designed and synthesized a high crystalline perylene-based HOF (PTBA) and an amorphous analog sample PTPA for photocatalytic H2O2 evolution. Under visible light irradiation, PTBA shows a higher photocatalytic H2O2 production rate of 2699 μmol g−1 h−1 than PTPA (2176 μmol g−1 h−1) and an apparent quantum yield (AQY) of 2.96% at 500 nm. The enhanced photocatalytic performance of PTBA is attributed to the promotion of the separation and transfer of photocarriers due to its high crystallinity. This work provides a precedent for the application of HOFs in the field of photocatalytic H2O2 generation. Full article
(This article belongs to the Special Issue Study on Synthesis and Photochemistry of Dyes)
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