molecules-logo

Journal Browser

Journal Browser

Explorations in Luminescent Complexes

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

Deadline for manuscript submissions: closed (15 January 2022) | Viewed by 14193

Special Issue Editor

MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
Interests: photophysics; photochemistry; metal–organic luminescent materials; molecular recognition and supramolecular coordination assembly and their applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metal−organic coordination complexes can be made to exhibit a wide range of photoluminescence (PL) behaviors by the integration and installation of metal ions, organic linkers, and inclusion guests. The PL’s origins can be multifaceted, from ligand/metal/guest-centered to involving metal-to-ligand, ligand-to-metal, or host–guest charge transfer states. The photon conversion and energy transfer processes can be differentiated from one-photon down-shifts to two or multi-photon up-conversions, resulting in UV/visible/near-infrared fluorescence, phosphorescence, or persistent luminescence. The PL tuning and modulating strategies can vary from temperature, pressure, solvent, ions, or pH to light, electric, or magnetic fields. The potential applications are abundant, and range from lighting, displays, lasing, imaging, sensing, and detecting to barcoding and anti-counterfeiting. We will dedicate this Special Issue to state-of-the-art explorations of any aspect of luminescent complexes.

Prof. Dr. Mei Pan
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

  • luminescent complexes
  • photon conversion
  • energy transfer
  • MLCT and LMCT
  • two-photon excited emission
  • up-conversion
  • amplified spontaneous emission
  • room-temperature phosphorescence
  • persistent luminescence
  • near-infrared
  • PL sensor
  • anti-counterfeiting
  • cell imaging
  • white LEDs

Published Papers (5 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

11 pages, 3104 KiB  
Article
Structure, Luminescent Sensing and Proton Conduction of a Boiling-Water-Stable Zn(II) Metal-Organic Framework
by Hua-Qun Zhou, Sai-Li Zheng, Can-Min Wu, Xin-He Ye, Wei-Ming Liao and Jun He
Molecules 2021, 26(16), 5044; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26165044 - 20 Aug 2021
Cited by 2 | Viewed by 1948
Abstract
A novel Zn(II) metal-organic framework [Zn4O(C30H12F4O4S8)3]n, namely ZnBPD-4F4TS, has been constructed from a fluoro- and thiophenethio-functionalized ligand 2,2′,5,5′-tetrafluoro-3,3′,6,6′-tetrakis(2-thiophenethio)-4,4′-biphenyl dicarboxylic acid (H2BPD-4F4TS). ZnBPD-4F4TS [...] Read more.
A novel Zn(II) metal-organic framework [Zn4O(C30H12F4O4S8)3]n, namely ZnBPD-4F4TS, has been constructed from a fluoro- and thiophenethio-functionalized ligand 2,2′,5,5′-tetrafluoro-3,3′,6,6′-tetrakis(2-thiophenethio)-4,4′-biphenyl dicarboxylic acid (H2BPD-4F4TS). ZnBPD-4F4TS shows a broad green emission around 520 nm in solid state luminescence, with a Commission International De L’Eclairage (CIE) coordinate at x = 0.264, y = 0.403. Since d10-configured Zn(II) is electrochemically inert, its photoluminescence is likely ascribed to ligand-based luminescence which originates from the well-conjugated system of phenyl and thiophenethio moieties. Its luminescent intensities diminish to different extents when exposed to various metal ions, indicating its potential as an optical sensor for detecting metal ion species. Furthermore, ZnBPD-4F4TS and its NH4Br-loaded composite, NH4Br@ZnBPD-4F4TS, were used for proton conduction measurements in different relative humidity (RH) levels and temperatures. Original ZnBPD-4F4TS shows a low proton conductivity of 9.47 × 10−10 S cm−1 while NH4Br@ZnBPD-4F4TS shows a more than 25,000-fold enhanced value of 2.38 × 105 S cm−1 at 40 °C and 90% RH. Both of the proton transport processes in ZnBPD-4F4TS and NH4Br@ZnBPD-4F4TS belong to the Grotthuss mechanism with Ea = 0.40 and 0.32 eV, respectively. Full article
(This article belongs to the Special Issue Explorations in Luminescent Complexes)
Show Figures

Figure 1

13 pages, 5695 KiB  
Article
Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine
by Tian-Tian Wang, Jing-Yi Liu, Rui Guo, Jun-Dan An, Jian-Zhong Huo, Yuan-Yuan Liu, Wei Shi and Bin Ding
Molecules 2021, 26(12), 3673; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26123673 - 16 Jun 2021
Cited by 11 | Viewed by 4161
Abstract
Metal-organic frameworks (MOFs) have been rapidly developed for their broad applications in many different chemistry and materials fields. In this work, a multi-dentate building block 5-(4-(tetrazol-5-yl)phenyl)-isophthalic acid (H3L) containing tetrazole and carbolxylate moieties was employed for the synthesis of a two-dimensional [...] Read more.
Metal-organic frameworks (MOFs) have been rapidly developed for their broad applications in many different chemistry and materials fields. In this work, a multi-dentate building block 5-(4-(tetrazol-5-yl)phenyl)-isophthalic acid (H3L) containing tetrazole and carbolxylate moieties was employed for the synthesis of a two-dimensional (2D) lanthanide MOF [La(HL)(DMF)2(NO3)] (DMF = N,N-dimethylformamide) (1) under solvothermal condition. The fluorescent sensing application of 1 was investigated. 1 exhibits high sensitivity recognition for antibiotic nitrofurantoin (Ksv: 3.0 × 103 M−1 and detection limit: 17.0 μM) and amino acid l-tyrosine (Ksv: 1.4 × 104 M−1 and detection limit: 3.6 μM). This work provides a feasible detection platform of 2D MOFs for highly sensitive discrimination of antibiotics and amino acids. Full article
(This article belongs to the Special Issue Explorations in Luminescent Complexes)
Show Figures

Figure 1

12 pages, 2677 KiB  
Article
A Novel Fluorescent Probe for Hydrogen Peroxide and Its Application in Bio-Imaging
by Yingying Zuo, Yang Jiao, Chunming Ma and Chunying Duan
Molecules 2021, 26(11), 3352; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26113352 - 02 Jun 2021
Cited by 14 | Viewed by 2661
Abstract
Hydrogen peroxide (H2O2) plays an important role in the human body and monitoring its level is meaningful due to the relationship between its level and diseases. A fluorescent sensor (CMB) based on coumarin was designed and its [...] Read more.
Hydrogen peroxide (H2O2) plays an important role in the human body and monitoring its level is meaningful due to the relationship between its level and diseases. A fluorescent sensor (CMB) based on coumarin was designed and its ability for detecting hydrogen peroxide by fluorescence signals was also studied. The CMB showed an approximate 25-fold fluorescence enhancement after adding H2O2 due to the interaction between the CMB and H2O2 and had the potential for detecting physiological H2O2. It also showed good biocompatibility and permeability, allowing it to penetrate cell membranes and zebrafish tissues, thus it can perform fluorescence imaging of H2O2 in living cells and zebrafish. This probe is a promising tool for monitoring the level of H2O2 in related physiological and pathological research. Full article
(This article belongs to the Special Issue Explorations in Luminescent Complexes)
Show Figures

Figure 1

11 pages, 2989 KiB  
Article
Visual Detection of Triethylamine and a Dual Input/Output Logic Gate Based on a Eu3+-Complex
by Bao-Ning Li, Yuan-Yuan Liu, Ya-Ping Wang and Mei Pan
Molecules 2021, 26(11), 3244; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26113244 - 28 May 2021
Cited by 5 | Viewed by 2044
Abstract
A series of Ln3+-metal centered complexes, Ln(TTA)3(DPPI) (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3; or Ln = Gd, 4) [(DPPI = N-(4-(1H-imidazo [4,5-f][1,10]phenanthrolin-2-yl)phenyl)-N-phenylbenzenamine) and (TTA = 2-Thenoyltrifluoroacetone)] [...] Read more.
A series of Ln3+-metal centered complexes, Ln(TTA)3(DPPI) (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3; or Ln = Gd, 4) [(DPPI = N-(4-(1H-imidazo [4,5-f][1,10]phenanthrolin-2-yl)phenyl)-N-phenylbenzenamine) and (TTA = 2-Thenoyltrifluoroacetone)] have been synthesized and characterized. Among which, the Eu3+-complex shows efficient purity red luminescence in dimethylsulfoxide (DMSO) solution, with a Commission International De L’ Eclairage (CIE) coordinate at x = 0.638, y = 0.323 and ΦEuL = 38.9%. Interestingly, increasing the amounts of triethylamine (TEA) in the solution regulates the energy transfer between the ligand and the Eu3+-metal center, which further leads to the luminescence color changing from red to white, and then bluish-green depending on the different excitation wavelengths. Based on this, we have designed the IMPLICATION logic gate for TEA recognition by applying the amounts of TEA and the excitation wavelengths as the dual input signal, which makes this Eu3+-complex a promising candidate for TEA-sensing optical sensors. Full article
(This article belongs to the Special Issue Explorations in Luminescent Complexes)
Show Figures

Figure 1

15 pages, 23242 KiB  
Article
Construction of a Stable Lanthanide Metal-Organic Framework as a Luminescent Probe for Rapid Naked-Eye Recognition of Fe3+ and Acetone
by Jiayishuo Wang, Muxin Yu, Lian Chen, Zhijia Li, Shengchang Li, Feilong Jiang and Maochun Hong
Molecules 2021, 26(6), 1695; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26061695 - 18 Mar 2021
Cited by 23 | Viewed by 2805
Abstract
Four lanthanide metal-organic frameworks (Ln-MOFs), namely {[Me2NH2][LnL]·2H2O}n (Ln = Eu 1, Tb 2, Dy 3, Gd 4), have been constructed from a new tetradentate ligand 1-(3,5-dicarboxylatobenzyl)-3,5-pyrazole dicarboxylic acid (H4L). These [...] Read more.
Four lanthanide metal-organic frameworks (Ln-MOFs), namely {[Me2NH2][LnL]·2H2O}n (Ln = Eu 1, Tb 2, Dy 3, Gd 4), have been constructed from a new tetradentate ligand 1-(3,5-dicarboxylatobenzyl)-3,5-pyrazole dicarboxylic acid (H4L). These isostructural Ln-MOFs, crystallizing in the monoclinic P21/c space group, feature a 3D structure with 7.5 Å × 9.8 Å channels along the b axis and the point symbol of {410.614.84} {45.6}2. The framework shows high air and hydrolytic stability, which can keep stable after exposed to humid air for 30 days or immersed in water for seven days. Four MOFs with different lanthanide ions (Eu3+, Tb3+, Dy3+, and Gd3+) ions exhibit red, green, yellow, and blue emissions, respectively. The Tb-MOF emitting bright green luminescence can selectively and rapidly (<40 s) detect Fe3+ in aqueous media via a fluorescence quenching effect. The detection shows excellent anti-inference ability toward many other cations and can be easily recognized by naked eyes. In addition, it can also be utilized as a rapid fluorescent sensor to detect acetone solvent as well as acetone vapor. Similar results of sensing experiments were observed from Eu-MOF. The sensing mechanism are further discussed. Full article
(This article belongs to the Special Issue Explorations in Luminescent Complexes)
Show Figures

Graphical abstract

Back to TopTop