Ultrafast Photoinduced Electron Transfer between Carbon Nanoparticles and Cyclometalated Rhodium and Iridium Complexes

2015 ◽  
Vol 119 (44) ◽  
pp. 25122-25128 ◽  
Author(s):  
Somen Mondal ◽  
Sourav Kanti Seth ◽  
Parna Gupta ◽  
Pradipta Purkayastha
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Carbon Nanoparticles ◽  
Iridium Complexes

2-Aryl-1,3-dimethylbenzimidazolines as Effective Electron and Hydrogen Donors in Photoinduced Electron-Transfer Reactions

2015 ◽  
Vol 68 (11) ◽  
pp. 1640 ◽  
Author(s):  
Eietsu Hasegawa ◽  
Shin-ya Takizawa
Keyword(s):  
Electron Transfer ◽  
Hydrogen Atom ◽  
Photoinduced Electron Transfer ◽  
Hydrogen Atom Transfer ◽  
Transfer Reactions ◽  
Organic Substrates ◽  
Iridium Complexes ◽  
Effective Electron ◽  
Hydrogen Donors ◽  
Wavelength Light

2-Aryl-1,3-dimethylbenzimidazolines (DMBIHs) have been applied to photoinduced electron-transfer reductions of various organic substrates. Either direct or indirect electron transfer between the substrates and DMBIHs is utilized to promote the desired transformations. Photoexcitation of the substrates using light above 280 nm was carried out in the former protocol whereas a photosensitization method using materials such as substituted pyrenes, ruthenium and iridium complexes that absorb longer-wavelength light was employed in the latter. In these reactions, DMBIHs undergo initial electron transfer and subsequent proton or hydrogen atom transfer.

Synergic Influence of Reverse Micelle Confinement on the Enhancement in Photoinduced Electron Transfer to and from Carbon Nanoparticles

2015 ◽  
Vol 119 (24) ◽  
pp. 13887-13892 ◽  
Author(s):  
Somen Mondal ◽  
Tarasankar Das ◽  
Arnab Maity ◽  
Sourav Kanti Seth ◽  
Pradipta Purkayastha
Keyword(s):  
Electron Transfer ◽  
Reverse Micelle ◽  
Photoinduced Electron Transfer ◽  
Carbon Nanoparticles

Ultrafast Photoinduced Electron Transfer from Cyclometalated Rhodium and Iridium Complexes to Cyan Emitting Copper Nanoclusters: Footsteps toward Light Harvesting

2019 ◽  
Vol 4 (29) ◽  
pp. 8568-8573
Author(s):  
Soumyadip Bhunia ◽  
Sourav Kanti Seth ◽  
Parna Gupta ◽  
Manobina Karmakar ◽  
Prasanta Kumar Datta ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Light Harvesting ◽  
Iridium Complexes ◽  
Copper Nanoclusters

Surfactant chain length controls photoinduced electron transfer in surfactant bilayer protected carbon nanoparticles

2015 ◽  
Vol 141 ◽  
pp. 252-254 ◽  
Author(s):  
Somen Mondal ◽  
Tarasankar Das ◽  
Prasun Ghosh ◽  
Arnab Maity ◽  
Arabinda Mallick ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Chain Length ◽  
Photoinduced Electron Transfer ◽  
Carbon Nanoparticles

pH triggered reversible photoinduced electron transfer to and from carbon nanoparticles

2014 ◽  
Vol 50 (52) ◽  
pp. 6890 ◽  
Author(s):  
Somen Mondal ◽  
Manjunath Chatti ◽  
Arabinda Mallick ◽  
Pradipta Purkayastha
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Carbon Nanoparticles

scholarly journals Efficiency of photoinduced electron transfer in mono- and di-nuclear iridium complexes: a comparative study

2017 ◽  
Vol 41 (14) ◽  
pp. 6540-6545 ◽  
Author(s):  
Sourav Kanti Seth ◽  
Parna Gupta ◽  
Pradipta Purkayastha
Keyword(s):  
Electron Transfer ◽  
Comparative Study ◽  
Photoinduced Electron Transfer ◽  
Dinuclear Complex ◽  
Iridium Complexes

Photoinduced electron transfer in mono- and dinuclear Ir(iii) complexes is dominated by the mononuclear as compared to the dinuclear complex.

Computationally Assisted Design of High Signal-to-Noise Photoinduced Electron Transfer-Based Voltage-Sensitive Dyes

2020 ◽  
Author(s):  
Rishikesh Kulkarni ◽  
Anneliese Gest ◽  
Chun Kei Lam ◽  
Benjamin Raliski ◽  
Feroz James ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Dft Calculations ◽  
Photoinduced Electron Transfer ◽  
Density Functional ◽  
Embryonic Stem ◽  
High Sensitivity ◽  
Md Simulations ◽  
High Signal ◽  
Signal To Noise ◽  
Green Fluorescent

<p>High signal-to-noise optical voltage indicators will enable simultaneous interrogation of membrane potential in large ensembles of neurons. However, design principles for voltage sensors with high sensitivity and brightness remain elusive, limiting the applicability of voltage imaging. In this paper, we use molecular dynamics (MD) simulations and density functional theory (DFT) calculations to guide the design of a bright and sensitive green-fluorescent voltage-sensitive fluorophore, or VoltageFluor (VF dye), that uses photoinduced electron transfer (PeT) as a voltage-sensing mechanism. MD simulations predict an 11% increase in sensitivity due to membrane orientation, while DFT calculations predict an increase in fluorescence quantum yield, but a decrease in sensitivity due to a decrease in rate of PeT. We confirm these predictions by synthesizing a new VF dye and demonstrating that it displays the expected improvements by doubling the brightness and retaining similar sensitivity to prior VF dyes. Combining theoretical predictions and experimental validation has resulted in the synthesis of the highest signal-to-noise green VF dye to date. We use this new voltage indicator to monitor the electrophysiological maturation of human embryonic stem cell-derived medium spiny neurons. </p>

Sign in / Sign up

Export Citation Format

Share Document