Photophysical Properties of Metal Ion Functionalized NaY Zeolite

2014 ◽  
Vol 90 (3) ◽  
pp. 503-510 ◽  
Author(s):  
Tian-Wei Duan ◽  
Bing Yan
Keyword(s):  
Metal Ion ◽  
Photophysical Properties ◽  
Nay Zeolite

Photophysical Characterisation, Metal Ion Binding and Enantiomeric Recognition of Chiral Ligands Containing Phenazine Fluorophore

2004 ◽  
Vol 69 (4) ◽  
pp. 885-896 ◽  
Author(s):  
Luisa Stella Dolci ◽  
Péter Huszthy ◽  
Erika Samu ◽  
Marco Montalti ◽  
Luca Prodi ◽  
...  
Keyword(s):  
Metal Ion ◽  
Photophysical Properties ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Ammonium Ions ◽  
Enantiomerically Pure ◽  
Binding Process ◽  
High Affinity ◽  
Enantiomeric Recognition ◽  
Chiral Species

Enantiomerically pure dimethyl- and diisobutyl-substituted phenazino-18-crown-6 ligands bind metal and ammonium ions and also primary aralkylammonium perchlorates in acetonitrile with high affinity, causing pronounced changes in their luminescence properties. In addition, they show enantioselectivity towards chiral primary aralkylammonium perchlorates. The possibility to monitor the binding process by photoluminescence spectroscopy can gain ground for the design of very efficient enantioselective chemosensors for chiral species. The observed changes in the photophysical properties are also an important tool for understanding the interactions present in the adduct.

Photochemistry of Squaraine Dyes. 8. Photophysical Properties of Crown Ether Squaraine Fluoroionophores and Their Metal Ion Complexes

1994 ◽  
Vol 98 (37) ◽  
pp. 9291-9296 ◽  
Author(s):  
Suresh Das ◽  
K. George Thomas ◽  
K. J. Thomas ◽  
Prashant V. Kamat ◽  
M. V. George
Keyword(s):  
Crown Ether ◽  
Metal Ion ◽  
Photophysical Properties ◽  
Metal Ion Complexes ◽  
Squaraine Dyes

New poly(p-phenylene vinylene) derivatives with two oxadiazole rings per repeat unit: Synthesis, photophysical properties, electroluminescence, and metal ion recognition

2004 ◽  
Vol 42 (9) ◽  
pp. 2112-2123 ◽  
Author(s):  
John A. Mikroyannidis ◽  
Ioakim K. Spiliopoulos ◽  
Theodoros S. Kasimis ◽  
Abhishek P. Kulkarni ◽  
Samson A. Jenekhe
Keyword(s):  
Metal Ion ◽  
Photophysical Properties ◽  
Repeat Unit ◽  
Phenylene Vinylene ◽  
Ion Recognition

scholarly journals Photoactivity of Metal-Phenylporphyrins Adsorbed on TiO2 Under Visible Light Radiation: Influence of Central Metal

2010 ◽  
Vol 4 (1) ◽  
pp. 15-22
Author(s):  
Gilma Granados-Oliveros ◽  
Fernando Martínez Ortega ◽  
Edgar Páez-Mozo ◽  
Corinne Ferronato ◽  
Jean-Marc Chovelon
Keyword(s):  
Visible Light ◽  
Metal Ion ◽  
Photophysical Properties ◽  
Molecular Orbitals ◽  
Frontier Molecular Orbitals ◽  
Central Metal ◽  
Carboxylate Groups ◽  
Quantum Chemical Methods ◽  
Ft Ir ◽  
Good Agreement

A set of Co, Cu, Zn and metal-free phenylporphyrins were studied by spectroscopic (UV-vis, FTIR) and quantum-chemical methods. The Q and Soret bands were identified in the UV-vis spectra of solid samples. In all the complexes the frontier molecular orbitals (OMs) predict that the electronic processes sites are localized on the ligand rather than in the metal atom. Metal ion has a largely influence on energy of OMs. The calculated values of electronic transitions between the OMs are in good agreement with the UV-vis data. Phenyl porphyrins were attached onto TiO2 to be evaluated as photocatalysts, under visible light irradiation. The interaction of porphyrins with TiO2 surface was investigated using UV-vis and FT-IR spectroscopies and it was found that the dyes were adsorbed to the semiconductor by carboxylate groups. Degradation of luminol and photooxidation of terephthalic acid to 2-hydroxyterephthalic acid (TAOH) were employed as probe reactions. Luminol was degraded from 20 – 60% in presence of O2. In the same way, the formation of TAOH values of comprises between 0.12 – 0.17 mM, in presence of H2O2 and O2 was obtained. It was found that superoxide anion radicals (O2•_) are primarily formed and they are the precursor for the hydroxyl radicals (•OH) production when H2O2 is added to suspension. Influence of metal on photoactivity was analyzed, specifically, in terms of: the nature of metal (number of d electrons), photophysical properties and energies of frontier molecular orbitals (OMs). Apparently, energy of OMs is an important factor which could affect photoactivity of sensitizers attached on TiO2

scholarly journals Synthesis, Photophysical Properties, and Metal-Ion Recognition Studies of Fluoroionophores Based on 1-(2-Pyridyl)-4-Styrylpyrazoles

ACS Omega ◽  
2019 ◽  
Vol 4 (15) ◽  
pp. 16689-16700 ◽  
Author(s):  
Jessica Orrego-Hernández ◽  
Justo Cobo ◽  
Jaime Portilla
Keyword(s):  
Metal Ion ◽  
Photophysical Properties ◽  
Ion Recognition

scholarly journals Synthesis, Characterization and Coordination Chemistry of a Phenanthridine-Containing N-Heterocyclic Carbene Ligand

2020 ◽  
Author(s):  
Rajarshi Mondal ◽  
Robert J. Ortiz ◽  
Jason D. Braun ◽  
David E. Herbert
Keyword(s):  
Coordination Chemistry ◽  
Metal Ion ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coordination Complex ◽  
Imidazolium Salt ◽  
Cross Coupling Reaction

An N-heterocyclic carbene ligand precursor bearing a π-extended phenanthridine (3,4-benzoquinoline) unit is presented. The proligand was isolated as the imidazolium salt of chloride (1•HCl), bromide (1•HBr) or hexafluorophosphate (1•HPF6) counterions. These salts can be deprotonated and the carbene installed on silver centres using Ag2O as both a base and a source of metal ion. The resulting Ag(I) complex (1)AgCl can be used in a transmetalation reaction to generate a Pd(II) coordination complex (1)Pd(CH3CN)Cl2. The characterization and photophysical properties of these complexes is presented, along with a demonstration of the utility of (1)Pd(CH3CN)Cl2 in mediating a catalytic C-N cross-coupling reaction for the preparation of the pharmaceutical Piribedil.

Self-assembly of metal-ion-responsive supramolecular coordination complexes and their photophysical properties

2017 ◽  
Vol 46 (10) ◽  
pp. 3120-3124 ◽  
Author(s):  
Zuoli He ◽  
Meng Li ◽  
Wenxiu Que ◽  
Peter J. Stang
Keyword(s):  
Self Assembly ◽  
Metal Ion ◽  
Photophysical Properties ◽  
Coordination Complexes ◽  
Synthesis And Characterization ◽  
Supramolecular Coordination ◽  
Self Assembled

Herein, we describe the synthesis and characterization of two newly self-assembled supramolecular coordination complexes (SCCs) by using the cis-{Pt(PEt3)2}2+ center and two different kinds of pyridyl-derivatized ligands.

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