scholarly journals Heterometal incorporation in NH2-MIL-125(Ti) and its participation in the photoinduced charge-separated excited state

2020 ◽  
Vol 56 (78) ◽  
pp. 11597-11600
Author(s):  
Lauren Hanna ◽  
Conor L. Long ◽  
Xiaoyi Zhang ◽  
Jenny V. Lockard
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
X Ray ◽  
Induced Charge ◽  
Spectroscopy Studies ◽  
Photoinduced Charge

X-ray spectroscopy studies reveal the location and role of Fe3+ sites incorporated in a Ti-based MOF exhibiting photo-induced charge separation.

scholarly journals Sc3N@Ih-C80 based donor–acceptor conjugate: role of thiophene spacer in promoting ultrafast excited state charge separation

RSC Advances ◽  
2020 ◽  
Vol 10 (34) ◽  
pp. 19861-19866
Author(s):  
Rubén Caballero ◽  
Luis David Servián ◽  
Habtom B. Gobeze ◽  
Olivia Fernandez-Delgado ◽  
Luis Echegoyen ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Charge Recombination ◽  
Photoinduced Charge Separation ◽  
Donor Acceptor ◽  
Photoinduced Charge ◽  
State Charge

Photoinduced charge separation and dark charge recombination occurring within picoseconds is observed in newly synthesized triphenylamine–thiophene-Sc3N@Ih-C80 and triphenylamine–thiophene-C60 conjugates.

The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

2016 ◽  
Vol 18 (6) ◽  
pp. 4300-4303 ◽  
Author(s):  
J. Huang ◽  
Y. Tang ◽  
K. L. Mulfort ◽  
X. Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Charge Separation ◽  
Cdse Quantum Dots ◽  
X Ray ◽  
Molecular Catalyst ◽  
Cdse Quantum Dot ◽  
Photoinduced Charge Separation ◽  
X Ray Absorption ◽  
Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

Picosecond time-resolved observation of photoinduced charge separation from the singlet excited state of porphyrin-quinone model systems

1981 ◽  
Vol 84 (2) ◽  
pp. 263-266 ◽  
Author(s):  
Masahito Migita ◽  
Tadashi Okada ◽  
Noboru Magata ◽  
Shinji Nishitani ◽  
Nobuyuki Kurata ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Model Systems ◽  
Singlet Excited State ◽  
Time Resolved ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Microenvironment alterations enhance photocurrents from photosystem I confined in supported lipid bilayers

2018 ◽  
Vol 6 (26) ◽  
pp. 12281-12290 ◽  
Author(s):  
Hanieh Niroomand ◽  
Ravi Pamu ◽  
Dibyendu Mukherjee ◽  
Bamin Khomami
Keyword(s):  
Lipid Bilayers ◽  
Photosystem I ◽  
Charge Separation ◽  
Critical Role ◽  
Supported Lipid Bilayers ◽  
Induced Charge

This work elucidates the role of natural membrane confinements of photosystem I complexes (PSI) in light-induced charge separation by comparing the photocurrents of isolated PSI with PSI encapsulated within solid-supported lipid bilayers on electrodes. Our results indicate the critical role of the microenvironment alterations in achieving enhanced photocurrent and stability.

scholarly journals Pt Deposites on TiO2 for Photocatalytic H2 Evolution: Pt Is Not Only the Cocatalyst, but Also the Defect Repair Agent

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1047 ◽  
Author(s):  
Zhan Shu ◽  
Yandi Cai ◽  
Jiawei Ji ◽  
Changjin Tang ◽  
Shuohan Yu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Charge Separation ◽  
H2 Production ◽  
H2 Evolution ◽  
X Ray ◽  
Production Activity ◽  
Defect Repair ◽  
New Perspective ◽  
Photocatalytic H2 Evolution

Pt, as a common cocatalyst, has been widely used in photocatalytic H2 evolution. However, the specific role of Pt in photocatalytic H2 evolution has not been thoroughly studied. In this paper, by employing three Pt sources with different charges (positive, negative and neutral), we systematically studied the charge effect of Pt sources on photocatalytic H2 evolution via TiO2 catalyst. According to the results of Raman, X-ray photoelectron spectroscopy (XPS), recycle experiments and photocurrent characterizations, it was found that TiO2 would produce electropositive defects during photocatalytic H2 evolution, inevitably leading to the decline of H2 production activity. Thanks to the electrostatic interaction, the electronegative Pt source not only promoted charge separation, but preferential deposited on electropositive defects, which acted as the defect repair agent, and thus resulted in the increased photocatalytic stability. This work may provide a new perspective for enhancing photocatalytic stability of hydrogen production.

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