scholarly journals Dipyridylmethane Ethers as Ligands for Luminescent Ir Complexes

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7161
Author(s):  
Giorgio Volpi ◽  
Claudio Garino ◽  
Roberto Gobetto ◽  
Carlo Nervi
Keyword(s):  
Electronic Structure ◽  
Quantum Yield ◽  
Electrochemical Properties ◽  
Electrochemical Behavior ◽  
Functional Group ◽  
Molecular Wires ◽  
Iridium Complexes ◽  
High Quantum Yield ◽  
Derivatives Of

This work reports two new cationic heteroleptic cyclometalated iridium complexes, containing ether derivatives of di(pyridin-2-yl)methanol. The new ligands are based on dipyridin-2-ylmethane and are designed to obtain ether-based intermediates with extended electronic conjugation by insertion of π system such as phenyl, allyl and ethynyl. Different synthetic strategies were employed to introduce these units, as molecular wires, between the dipyridin-2-ylmethane chelating portion and the terminal N-containing functional group, such as amine and carbamide. The corresponding complexes show luminescence in the blue region of the spectrum, lifetimes between 0.6 and 2.1 μs, high quantum yield and good electrochemical behavior. The computational description (DFT) of the electronic structure highlights the key role of the conjugated π systems on optical and electrochemical properties of the final products.

Organic Molecule Adsorption on Stepped Si–Au Surfaces: Role of Functional Group on Geometry and Electronic Structure

2019 ◽  
Vol 256 (7) ◽  
pp. 1800653
Author(s):  
Conor Hogan ◽  
Svetlana Suchkova ◽  
Friedhelm Bechstedt ◽  
Eugen Speiser ◽  
Sandhya Chandola ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Organic Molecule ◽  
Functional Group ◽  
Molecule Adsorption

The role of fluorine in high quantum yield oxyfluoride glasses and glass-ceramics

2021 ◽  
pp. 163512
Author(s):  
Thomas Meyneng ◽  
Jyothis Thomas ◽  
Yannick Ledemi ◽  
Mathieu Allix ◽  
Emmanuel Veron ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Glass Ceramics ◽  
High Quantum Yield ◽  
High Quantum ◽  
Oxyfluoride Glasses

Substituent effects on the electronic structure of the flat Blatter radical: Correlation analysis of experimental and computational data

2021 ◽  
Author(s):  
Piotr Kaszynski ◽  
Paulina Bartos ◽  
Aniket A. Hande ◽  
Anna Pietrzak ◽  
Anna CHROSTOWSKA
Keyword(s):  
Electronic Structure ◽  
Correlation Analysis ◽  
Functional Group ◽  
Substituent Effects ◽  
Cyclization Reactions ◽  
Computational Data ◽  
Derivatives Of

A series of C(10)–substituted derivatives of the 2-Ph-3H-[1,2,4]triazino[5,6,1-kl]phenoxazin-3-yl was obtained using the aza-Pschorr, photochemical and radical–induced cyclization reactions, and through functional group transformations of the C(10)–amino and C(10)–iodo derivatives. The...

scholarly journals Upconverting core-shell nanocrystals with high quantum yield under low irradiance: On the role of isotropic and thick shells

2015 ◽  
Vol 118 (19) ◽  
pp. 193105 ◽  
Author(s):  
Stefan Fischer ◽  
Noah J. J. Johnson ◽  
Jothirmayanantham Pichaandi ◽  
Jan Christoph Goldschmidt ◽  
Frank C. J. M. van Veggel
Keyword(s):  
Quantum Yield ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quantum ◽  
Thick Shells

High solid-state luminescence in propeller-shaped AIE-active pyridine–ketoiminate–boron complexes

2015 ◽  
Vol 13 (20) ◽  
pp. 5775-5782 ◽  
Author(s):  
Yanping Wu ◽  
Zhenyu Li ◽  
Qingsong Liu ◽  
Xiaoqing Wang ◽  
Hui Yan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solid State ◽  
Quantum Yield ◽  
Stokes Shift ◽  
Electronic Structure Calculations ◽  
High Quantum Yield ◽  
X Ray ◽  
Boron Complexes ◽  
Structure Calculations ◽  
State Luminescence

Two pyridine-ketoiminate-based organoboron complexes were demonstrated to possess aggregation-induced emission, large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis and electronic structure calculations.

scholarly journals Improved photodecarboxylation properties in zinc photocages constructed using m-nitrophenylacetic acid variants

2021 ◽  
Author(s):  
Austin Shigemoto ◽  
Avik Bhattacharjee ◽  
Erin Hickey ◽  
Hallee Boyd ◽  
Theresa McCormick ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Quantum Yield ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
Biological Applications ◽  
High Quantum Yield ◽  
High Quantum ◽  
Derivatives Of ◽  
Fluoro Derivatives

The methoxy- and fluoro-derivatives of meta-nitrophenylacetic acid (mNPA) chromophores undergo photodecarboxylation with comparable quantum yields to unsubstituted mNPA, but uncage at red-shifted excitation wavelengths. This observation prompted us to investigate DPAdeCageOMe (2-[bis(pyridin-2-ylmethyl)amino]-2-(4-methoxy-3-nitrophenyl)acetic acid) and DPAdeCageF (2-[bis(pyridin-2-ylmethyl)amino]-2-(4-fluoro-3-nitrophenyl)acetic acid) as Zn2+ photocages. DPAdeCageOMe has a high quantum yield and exhibits other photophysical properties comparable to XDPAdeCage ({bis[(2-pyridyl)methyl]amino}(9-oxo-2-xanthenyl) acetic acid), the best perforiming Zn2+ photocage reported to date. Since the synthesis of DPAdeCageOMe is more straightforward than XDPACage, the new photocage will be a highly competitive tool for biological applications.

Fabrication and photocatalytic activity of graphitic-C3N4 quantum dot-decorated basic zinc carbonate prepared by co-precipitation method

2021 ◽  
Author(s):  
Ping Zhao ◽  
Bo Jin ◽  
Qingchun Zhang ◽  
Ru-Fang Peng
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Quantum Yield ◽  
Carbon Nitride ◽  
Barbituric Acid ◽  
Functional Group ◽  
Precipitation Method ◽  
High Quantum Yield ◽  
Zinc Carbonate ◽  
Co Precipitation

Graphitic carbon nitride quantum dots (CNQDs) with high quantum yield (up to 43%) were synthesized by incorporating the unique organic functional group of barbituric acid into the framework of the...

AIE-active organoboron complexes with highly efficient solid-state luminescence and their application as gas sensitive materials

2015 ◽  
Vol 44 (31) ◽  
pp. 14063-14070 ◽  
Author(s):  
Shuwen Gong ◽  
Qingsong Liu ◽  
Xiaoqing Wang ◽  
Bo Xia ◽  
Zhipeng Liu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solid State ◽  
Quantum Yield ◽  
Stokes Shift ◽  
Electronic Structure Calculations ◽  
High Quantum Yield ◽  
X Ray ◽  
High Quantum ◽  
Structure Calculations ◽  
State Luminescence

Four benzothiazole–ketoiminate-based organoboron complexes were demonstrated to show aggregation-induced emission, a large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis, and electronic structure calculations.

Toxicity of Para-Chloro Substituted Benzene Derivatives in the Microtox™ Test

1985 ◽  
Vol 20 (2) ◽  
pp. 36-43 ◽  
Author(s):  
Klaus L.E. Kaiser ◽  
Juan M. Ribo ◽  
Brian M. Zaruk
Keyword(s):  
General Formula ◽  
Functional Group ◽  
Structural Parameters ◽  
Systematic Investigation ◽  
Photobacterium Phosphoreum ◽  
Benzene Derivatives ◽  
Quantitative Structure ◽  
Chlorinated Benzenes ◽  
Chloro Derivatives ◽  
Derivatives Of

Abstract This paper gives the results of part of a systematic investigation into contaminant toxicity to Photobacterium phosphoreum in the Microtox™ test. Reported are the toxicity values for 39 para-chloro substituted benzene derivatives of the general formula l-Cl-C6h4-4-X=CH2CH(NH2)COOH, F, SO2NH2, OCH2COOH, CH2COOH, CONHNH2, NHCOCH3, CONH2, CH=CHCOOH, SeOOH, CH2NH2, CH2CH2NH2, NO2, H, CF3, CHO, CH2OH, OH, CH3, CCl3, COCH3, COOH, NH2, SO2C6H5, Cl, CH2COCH3, COCl, CN, OCH3, NCO, NHCH3, I, COC6H5, CH2Cl, SH, CH2SH, NCS, CH2CN and SO2C6H4Cl. Except for the last compound, whose solubility is below the required concentration, the toxicities increase in the presented order with a total range of more than three orders of magnitude. The data are discussed in terms of quantitative structure-toxicity correlations with compound-specific structural parameters. In combination with a previously developed submodel on chlorinated benzenes, phenols, nitrobenzenes and anilines, the observed relationships allow the prediction of the toxicity of some 780 possible chloro derivatives of the general formula C6H5-nClnX, where n=<5 and X is a functional group as listed above.

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