Efficient radical‐enhanced intersystem crossing in an NDI‐TEMPO dyad: photophysics, electron spin polarization, and application in photodynamic therapy

Z Wang, Y Gao, M Hussain, S Kundu… - … A European Journal, 2018 - Wiley Online Library
Abstract A compact naphthalenediimide (NDI)–2, 2, 6, 6‐tetramethylpiperidinyloxy (TEMPO)
dyad has been prepared with the aim of studying radical‐enhanced intersystem crossing …

A phenomenological scheme for reversed quartet mechanism of electron spin polarization in covalently linked systems of chromophore and free radical …

AK Tripathi, V Rane, S Kundu, R Das - The Journal of Chemical …, 2019 - pubs.aip.org
Generation of electron spin polarization (ESP) during the bimolecular quenching of an
excited chromophore by a free radical is generally explained by the radical–triplet pair …

Nitric Oxide Radical-Based Nanoparticles as Magnetic Resonance Imaging Probes for Ascorbic Acid Quantification

N Iizuka, Y Akizuki, T Umeno, N Suzuki… - ACS Applied Nano …, 2024 - ACS Publications
Ascorbic acid (AsA) is intravenously administered as a drug for disease therapy, fatigue
recovery, antiaging, and cancer therapies. However, the traditionally quantitative AsA …

Thermal-and pH-dependent size variable radical nanoparticles and its water proton relaxivity for metal-free MRI functional contrast agents

K Morishita, S Murayama, T Araki, I Aoki… - The Journal of …, 2016 - ACS Publications
For development of the metal-free MRI contrast agents, we prepared the supra-molecular
organic radical, TEMPO-UBD, carrying TEMPO radical, as well as the urea, alkyl group, and …

Water-proton relaxivities of radical nanoparticles self-assembled via hydration or dehydration processes

K Morishita, Y Okamoto, S Murayama, K Usui… - Langmuir, 2017 - ACS Publications
Nanoparticles capable of accumulating in tumor tissues are promising materials for tumor
imaging and therapy. In this study, two radical nanoparticles (RNPs), denoted as 1 and 2 …

Electron spin–lattice relaxation mechanisms of nitroxyl radicals in ionic liquids and conventional organic liquids: temperature dependence of a thermally activated …

K Kundu, DR Kattnig, BY Mladenova… - The Journal of …, 2015 - ACS Publications
During the past two decades, several studies have established a significant role played by a
thermally activated process in the electron spin relaxation of nitroxyl free radicals in liquid …

Electron Spin Relaxation of C60 Monoanion in Liquid Solution: Applicability of Kivelson–Orbach Mechanism

K Kundu, DR Kattnig, B Mladenova… - The Journal of …, 2015 - ACS Publications
We report the results of our investigation on the electron spin relaxation mechanism of the
monoanion of C60 fullerene in liquid solution. The solvent chosen was carbon disulfide …