Engineering the electronic structure and optical properties of g-C3N4 by non-metal ion doping

2016 ◽  
Vol 4 (28) ◽  
pp. 6839-6847 ◽  
Author(s):  
Qianyi Guo ◽  
Yuanhao Zhang ◽  
Jianrong Qiu ◽  
Guoping Dong
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Metal Ions ◽  
Metal Ion ◽  
Carbon Nitride ◽  
Emission Spectra ◽  
Ion Doping ◽  
Pl Emission

The normalized PL emission spectra of graphite-like carbon nitride (g-C3N4) modified with different non-metal ions (boron and sulfur) exhibit interesting scientific variation.

One-step hydrothermal synthesis of cobalt and potassium codoped CdSe quantum dots with high visible light photocatalytic activity

CrystEngComm ◽  
2015 ◽  
Vol 17 (7) ◽  
pp. 1701-1709 ◽  
Author(s):  
Changchang Ma ◽  
Mingjun Zhou ◽  
Dan Wu ◽  
Mengyao Feng ◽  
Xinlin Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Electronic Structure ◽  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Metal Ion ◽  
Cdse Quantum Dots ◽  
Ion Doping ◽  
One Step ◽  
Visible Light Photocatalytic

The effect of metal ion doping on the electronic structure and optical properties of CdSe quantum dots has been investigated by various characterization techniques and experiments.

Effect of co-doping of alkali metal ions on Ca0.5RE1−x(MoO4)2:xEu3+ (RE = Y, La) phosphors with enhanced luminescence properties

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 80390-80397 ◽  
Author(s):  
Venkatakrishnan Mahalingam ◽  
Jagannathan Thirumalai
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Emission Spectra ◽  
Luminescence Properties ◽  
Alkali Metal Ions ◽  
Elemental Mapping ◽  
Co Doping ◽  
Pl Emission ◽  
Enhanced Luminescence

Illustration of elemental mapping and PL emission spectra of the phosphors, Ca0.5RE1−x(MoO4)2:Eu3+,M+ (RE = Y, La; M = Li, K and Na).

scholarly journals Optical properties of selected 4d and 5d transition metal ion-doped glasses

RSC Advances ◽  
2017 ◽  
Vol 7 (42) ◽  
pp. 26411-26419 ◽  
Author(s):  
Hongli Wen ◽  
Bing-Ming Cheng ◽  
Peter A. Tanner
Keyword(s):  
Optical Properties ◽  
Charge Transfer ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Transition Metal Ions ◽  
Oxidation States ◽  
Transition Metal Ion ◽  
Doped Glasses

Charge transfer emission from transition metal ions in glasses and identification of their oxidation states.

scholarly journals Arylphosphonate-Tethered Porphyrins: Fluorescence Silencing Speaks a Metal Language in Living Enterocyte

2020 ◽  
Author(s):  
Claudia Keil ◽  
Julia Klein ◽  
Franz-Josef Schmitt ◽  
Yunus Zorlu ◽  
Hajo Haase ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Toxic Metal ◽  
Emission Spectra ◽  
Cellular Membrane ◽  
Fluorescence Decay ◽  
Ion Concentrations ◽  
Turn On ◽  
Sensor Platform ◽  
Porphyrin Core

<p>We report the application of a highly versatile and</p> <p>engineerable novel sensor platform to monitor biologically significant</p> <p>and toxic metal ions in live human Caco-2 enterocytes. The extended</p> <p>conjugation between the fluorescent porphyrin core and metal ions via</p> <p>aromatic phenylphosphonic acid tethers generates a unique turn off</p> <p>and turn on fluorescence and, in addition, shifts in absorption and</p> <p>emission spectra for zinc, cobalt, cadmium and mercury. The reported</p> <p>fluorescent probes p-H8TPPA and m-H8TPPA can monitor a wide</p> <p>range of metal ion concentrations via fluorescence titration and also</p> <p>via fluorescence decay curves. Cu and Zn-induced turn off</p> <p>fluorescence can be differentially reversed by the addition of common</p> <p>chelators. Both p-H8TPPA and m-H8TPPA readily pass the</p> <p>mammalian cellular membrane due to their amphipathic character as</p> <p>confirmed by confocal microscopic imaging of living enterocytes.</p>

MCD spectroscopy and TD-DFT calculations of low-symmetry acenaphthoporphyrins with dual fluorescence

2013 ◽  
Vol 17 (10) ◽  
pp. 996-1007 ◽  
Author(s):  
John Mack ◽  
Jun Nakamura ◽  
Tetsuo Okujima ◽  
Hiroko Yamada ◽  
Hidemitsu Uno ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Dft Calculations ◽  
Magnetic Circular Dichroism ◽  
Emission Spectra ◽  
Dual Fluorescence ◽  
Band Region ◽  
Td Dft ◽  
Sign Sequence ◽  
Low Symmetry

Magnetic circular dichroism (MCD) spectroscopy and TD-DFT calculations are used to analyze the electronic structure and optical properties of low-symmetry acenaphthoporphyrins with AAAB, ABAB and AABB structures. Evidence for dual fluorescence caused by tautomerism has been identified in the emission spectra of the AAAB and ABAB compounds. The sign sequences observed for the Q and B bands in the MCD spectra have been used to validate the results of the TD-DFT calculations. An anomalous +/- sign sequence is observed in the B band region with ascending energy similar to that reported previously for metal tetraphenyltetraacenaphthoporphyrin complexes.

Keto-salicylaldehyde azine: asymmetric substituent effect on their optical properties via electron-donating group insertion

2020 ◽  
Vol 8 (3) ◽  
pp. 996-1001 ◽  
Author(s):  
Jialin Tong ◽  
Kexin Zhang ◽  
Jing Wang ◽  
Hui Li ◽  
Fan Zhou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Substituent Effect ◽  
Metal Ion ◽  
Substitution Effect

Asymmetric substitution effect at K-terminal or S-terminal in KSA-based derivatives plays a key role in their AIE performance and metal ion responsiveness via simple intrinsic electronic structure tunings.

Luminescence Studies on Lithium-Strontium Borophosphate Glasses Doped with Cr, Ni and Zn Ions

2012 ◽  
Vol 626 ◽  
pp. 16-20 ◽  
Author(s):  
Poh Sum Wong ◽  
Wan Ming Hua ◽  
Rosli Hussin ◽  
Zuhairi Ibrahim
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Emission Spectra ◽  
Transition Metal Ions ◽  
Photoluminescence Spectroscopy ◽  
Luminescence Properties ◽  
Luminescence Spectra ◽  
Doped Glass ◽  
Zn Ions

Luminescence material is a solid which converts certain types of energy into electromagnetic radiation over and above thermal radiation. Due to the limited studies on luminescence properties of the transition metal ion doped glass, this present study aiming to understand further the effect of doping different transition metal ions to the luminescence properties. This paper report on the luminescence properties of 20Li2O-20SrO-30B2O3-30P2O5 glasses doped from the photoluminescence spectroscopy. The luminescence spectra of 20Li2O-20SrO-30B2O3-30P2O5-x with x = 1 mol % of different transition metal ions (Cr, Ni, and Zn) which had been prepared by melt quenching technique. The luminescence properties were analyzed using photoluminescence spectroscopy. Based on the emission spectra obtained from 20Li2O-20SrO-30B2O3-30P2O5-Cr, it consists of two emission bands at around 348 nm and 369 nm. While for the luminescence spectra of 20Li2O-20SrO-30B2O3-30P2O5-Ni, it exhibits only one emission band which is at around 363 nm. Lastly, for the luminescence spectra of 20Li2O-20SrO-30B2O3-30P2O5-Zn, it exhibits two emission bands at around 379 nm and 434 nm.

A novel label-free strategy for pathogenic DNA detection based on metal ion binding-induced fluorescence quenching of graphitic carbon nitride nanosheets

The Analyst ◽  
2017 ◽  
Vol 142 (14) ◽  
pp. 2617-2623 ◽  
Author(s):  
Yan Xiao ◽  
Yuhao Sheng ◽  
Jie Zhou ◽  
Miaomiao Chen ◽  
Wei Wen ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Metal Ions ◽  
Metal Ion ◽  
Carbon Nitride ◽  
Dna Detection ◽  
Ion Binding ◽  
Label Free ◽  
Metal Ion Binding ◽  
Fluorescence Sensing ◽  
Carbon Nitride Nanosheets

A novel label-free fluorescence sensing strategy based on g-C3N4 nanosheets and metal ions is designed for pathogenic DNA detection.

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