Results 91 to 100 of about 596,435 (207)

Editorial: Metal-free oxidative transformations in organic synthesis

Frontiers in Chemistry, 2022
Fateh Veer Singh, Toshifumi Dohi, Ravi Kumar   +2 more
doaj   +1 more source

Novel Metal-Free Synthesis of 3-Substituted Isocoumarins and Evaluation of Their Fluorescence Properties for Potential Applications

Molecules
A novel metal-free synthesis of 3-substituted isocoumarins through a sequential O-acylation/Wittig reaction has been established. The readily accessible (2-carboxybenzyl)-triphenylphosphonium bromide and diverse chlorides produced various 1H-isochromen-1-
Mei Sun, Chong-Yang Zeng, Lu-Lu Bu, Mai Xu, Kai Chen, Jia-Lin Liu, Tao Zhang, Jia-You Dai, Jia-Xin Hong, Ming-Wu Ding   +9 more
doaj   +1 more source

Light Turning Mirrors in SiON Optical Waveguides for Hybrid Integration with CMOS Photo-detectors [PDF]

, 2011
A new method is proposed for hybrid integration of SiON optical waveguides and standard CMOS photo-detectors based on anisotropic etching of 45° facets in a Si substrate.
Driessen, A., Hoekstra, H.J.W.M., Pollnau, M., Sengo, G., Çivitci, F.   +4 more
core   +2 more sources

Metal free texaphyrin synthesis

, 2003
The present invention provides a process of synthesizing a compound of Formula I by treating, in an inert medium and in the presence of an organic base, a compound of formula A with an organo metallic agent capable of acting as an outer sphere oxidant to form a compound of Formula I.
Jonathan L. Sessler, Darren Magda, Sharon Hannah   +2 more
openaire   +2 more sources

Nucleophilic functionalization of thianthrenium salts under basic conditions

Beilstein Journal of Organic Chemistry
In recent years, S-(alkyl)thianthrenium salts have become an important means of functionalizing alcohol compounds. However, additional transition metal catalysts and/or visible light are required. Herein, a direct thioetherification/amination reaction of
Xinting Fan, Duo Zhang, Xiangchuan Xiu, Bin Xu, Yu Yuan, Feng Chen, Pan Gao   +6 more
doaj   +1 more source

PRÓTESE DENTÁRIA METAL FREE

Revista Fluminense de Odontologia, 2019
Resumo Os materiais protéticos detém um papel de relevância, a escolha de um determinado material para uso deve levar em conta vários fatores. Muitas vezes, têm-se um material resistente, mas com poucas características favoráveis quanto a opalescência e translucidez. Deve-se considerar materiais restauradores com propriedades que possibilitem restituir
openaire   +2 more sources

Noble-metal-free sunlight harvesting meta-surface for water evaporation

We present ultrathin multilayer metamaterial absorbers based on abundant, low-cost materials, to effectively harness solar energy for heating and evaporation of ...
Hakuta, S., MacDonald, K.F., Zheludev, N.I.   +2 more
core  

Metal-Free Synthesis of 1,3-Divinylimidazolidin-2-One. [PDF]

ChemistryOpen
Lorenzen S, Graf R, Ignat'ev NV, Schulte M, Delp A, Calo F, Finze M.   +6 more
europepmc   +1 more source

Alkynyltriazenes in Photochemical Metal-Free Doyle-Kirmse Rearrangements. [PDF]

Angew Chem Int Ed Engl
Liu N, Dittmer LB, Maag M, Michel E, Rominger F, Rudolph M, Dreuw A, Hashmi ASK.   +7 more
europepmc   +1 more source

Noble-Metal-Free Electrocatalysis [PDF]

Acta Physico Chimica Sinica, 2020
Tierui Zhang, Shuangyin Wang
openaire   +1 more source