Results 51 to 60 of about 7,991 (240)

Photoreduction of Diphenylmethylenimine

The Journal of the Society of Chemical Industry, Japan, 1969
ジフェニルメチレンイミンを2-プロパノール中100W高圧水銀灯で50時間光照射すると,N-ジフェニルメチレン-1,1-ジフェニルメチルアミン,1,1-ジフェニルメチルアミン,1,1,1',1'-テトラフェニルジメチルアミンおよびジフェニルメタンをそれぞれ30,30,6および5%の収率で得た。この光化学反応が溶媒からの水素引抜きによることは,溶媒を2-プロパノールから水素供与能力の小さいメタノール,テトラヒドロフランおよびシクロヘキセンに変えるにしたがって,反応率が低下することより明らかとなった。さらにジフェニルメチレンイミンを低温の剛体溶媒中で光照射して,電子スピン共鳴吸収スペクトルを測定し,g=2.00にΔHmsl=18ガウスの一重項を見い出した。この電子スピン共鳴吸収スペクトルのシグナル強度にも,
Naoki TOSHIMA, Hidefumi HIRAI, Shoji MAKISHIMA   +2 more
openaire   +2 more sources

Atomic Tuning of Metal‐Support Interactions for Pathway‐Selective CO2 Photoreduction on TiO2

Advanced Science, EarlyView.
Single‐atom Fe and Cu catalysts anchored on TiO2 steer photocatalytic CO2 reduction toward distinct pathways. Fe sites favor rapid *CO desorption and selective CO formation, whereas Cu sites stabilize *CHO intermediates, enabling deep reduction and C─C coupling. Combined spectroscopy and DFT calculations reveal how metal–support interactions and oxygen
Dongyun Kim, Wonjae Ko, Byoung‐Hoon Lee, Sanghoon Kim, Yun Do Kim, Hyunsoo Ahn, Yoon Jung, Chan Woo Lee, Kug‐Seung Lee, Eunhee Gong, Junho Lee, Minho Kim, Taeghwan Hyeon, Su‐Il In   +13 more
wiley   +1 more source

Photochemical Redox Reactions of 2,6-Dichlorophenolindophenol and Its Use to Detect Photoreduced Quinones

Photochem
Photosynthesis in plants and the electron transport chain in mitochondria are examples of life-sustaining electron transfer processes. The benzoquinones plastoquinone and ubiquinone are key components of these pathways that cycle through their oxidized ...
Meredith G. Warsen, Soren Zimmer, Katherine Phan, Lisa M. Landino   +3 more
doaj   +1 more source

Enhancement of photocatalytic H2 evolution of eosin Y-sensitized reduced graphene oxide through a simple photoreaction

Beilstein Journal of Nanotechnology, 2014
A graphene oxide (GO) solution was irradiated by a Xenon lamp to form reduced graphene oxide (RGO). After irradiation, the epoxy, the carbonyl and the hydroxy groups are gradually removed from GO, resulting in an increase of sp2 π-conjugated domains and ...
Weiying Zhang, Yuexiang Li, Shaoqin Peng, Xiang Cai   +3 more
doaj   +1 more source

Photoreduction of Benzophenones by Amines in Room-Temperature Ionic Liquids

, 2016
The amine-mediated photoreduction of benzophenones in room temperature ionic liquids was investigated. Unlike the analogous reaction in organic solvents, the photoreduction produces mainly the corresponding benzhydrol in most cases.
John L. Reynolds (3065031), Paul B. Jones (1576930), Kimberly R. Erdner (3065034)   +2 more
core   +1 more source

Kinetic‐Directed Thermodynamic Repair Enables the Synthesis of High‐Strain 2D Sub‐Stoichiometric COFs

Advanced Science, EarlyView.
2D covalent organic frameworks are promising photocatalysts. Yet, precise synthesis of sub‐stoichiometric COFs remains challenging due to poor kinetic control. We propose a general strategy: tuning polymerization degree of kinetic intermediates via time or solvent polarity directs their thermodynamic repair into highly crystallization. Using [4+3]‐type
Xiang Pei, Kaifu Yu, Pan He, Hongqing Wu, Bo Jiang, Kewen Shu, Yang Li, Ya Tang, Lijian Ma   +8 more
wiley   +1 more source

A Printed Hydrogel Hybrid Electronic System With Thermoresponsive Adhesion for Neurophysiological Monitoring

Advanced Science, EarlyView.
This work develops a soft hybrid electronic system with printed thermoresponsive hydrogel electrodes, which enables high‐fidelity neural signal acquisition and stimulation. The system precisely assesses median and ulnar nerve injuries in clinical cases, realizing accurate diagnosis of neural impairment while ensuring customized adhesion regulation ...
Bo Pang, Ganguang Yang, Jiacheng Wen, Hangyu Gong, Caixin Gong, Yuqi Qiu, Zhixin Wang, Qingyang Zheng, Sen Zhou, Tianzhao Bu, Jia Tian, Zhouping Yin, Yutian Liu, Hao Wu   +13 more
wiley   +1 more source

Modulating Local Coordination in Single‐Atom Catalysts: From Fundamental Concepts to Emerging Breakthroughs in Electrocatalysis

Angewandte Chemie, EarlyView.
This review summarizes atomic‐level design strategies for single‐atom catalysts, emphasizing modulation of the local coordination environment, active‐site geometry, and metal‐support interactions to optimize catalytic activity and stability in electrocatalytic energy conversion applications.
Ashwani Kumar, Harun Tüysüz
wiley   +2 more sources

Accessible Low-Cost Laser Pointers for the Reduction of Aryl Halides via Triplet-Triplet Annihilation Upconversion in Aerated Gels

Gels, 2022
The search for economic alternatives in the use of expensive scientific equipment represents a way of providing many laboratories access to scientific developments that, otherwise, might be hampered by economic constraints.
Paola Domínguez Domínguez, Sebastian Bonardd, Samuel Martín Koury, Raúl Pérez-Ruiz, M. Consuelo Jiménez, David Díaz Díaz   +5 more
doaj   +1 more source

Ultrathin 2D In2O3 Nanosheets Confining Cu Single Atoms Synergized With Oxygen Vacancies for High Selectivity of Photocatalytic Reduction of CO2 to CO

Advanced Science, EarlyView.
In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure based on oxygen vacancies (OV)‐rich defects and low crystallinity to anchor Cu single atoms (Cu SAs) and synthesized Cu/In2O3‐Ns photocatalysts. ABSTRACT In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure ...
Yueying Yang, Xuan Xiang, Jiali Ren, Ying Bian, Xinyu Wang, Xiaoyang Lu, Yanjun Xue, Porun Liu, Cheng‐Hao Chuang, Xiaoli Zhang, Jian Tian   +10 more
wiley   +1 more source