نتایج جستجو برای: kinetic triplet

تعداد نتایج: 98741  

2016
Fabrizio Palumbo Francisco Bosca Isabel Maria Morera Inmaculada Andreu Miguel A Miranda

Cholesterol (Ch) is an important lipidic building block and a target for oxidative degradation, which can be induced via free radicals or singlet oxygen ((1)O2). Suprofen (SP) is a nonsteroidal anti-inflammatory drug that contains the 2-benzoylthiophene (BZT) chromophore and has a π,π* lowest triplet excited state. In the present work, dyads (S)- and (R)-SP-α-Ch (1 and 2), as well as (S)-SP-β-C...

2005
Daqing Gan Neil V. Blough Daniel E. Falvey

Title of Dissertation: AQUEOUS PHOTOCHEMISTRY OF 1,4BENZOQUINONES AND THEIR POSSIBLE ROLE IN THE PHOTOCHEMISTRY OF NATURAL ORGANIC MATTER Daqing Gan, Doctor of Philosophy, 2005 Dissertation Directed By: Professor Neil V. Blough Department of Chemistry and Biochemistry Past research implicated the presence of an organic species as a photochemical source of OH radical in natural waters. Quinones ...

Journal: :Journal of Physical Chemistry A 2021

A heavy particle impact vibrational excitation and dissociation model for CO2 is presented. This state-to-state based on the forced harmonic oscillator (FHO) theory, which more accurate than current state-of-the-art kinetic models of first-order perturbation theory. The first excited triplet state 3B2 CO2, including its structure, considered in our model, a consistent approach to also proposed....

Journal: :Nucleic acids research 1995
M Mitas A Yu J Dill T J Kamp E J Chambers I S Haworth

Although triplet repeat DNA sequences are scattered throughout the human genome, their biological function remains obscure. To aid in correlating potential structures of these nucleic acids with their function, we propose their classification based on the presence or absence of a palindromic dinucleotide within the triplet, the G + C content, and the presence or absence of a homopolymer. Five c...

Journal: :Dalton transactions 2013
Wanhua Wu Lianlian Liu Xiaoneng Cui Caishun Zhang Jianzhang Zhao

Bodipy is used for the preparation of Pt(II) bisacetylide complexes which show strong absorption of visible light and long-lived triplet state. Room temperature (RT) near-IR phosphorescence of Bodipy was observed. The π-conjugation framework of visible light-harvesting Bodipy ligand was connected to the Pt(II) center by the C≡C bond. The complexes were used as triplet photosensitizers for tripl...

Journal: :Physical chemistry chemical physics : PCCP 2018
Timur M Rvachov Hyungmok Son Juliana J Park Sepehr Ebadi Martin W Zwierlein Wolfgang Ketterle Alan O Jamison

We employ two-photon spectroscopy to study the vibrational states of the triplet ground state potential (a3Σ+) of the 23Na6Li molecule. Pairs of Na and Li atoms in an ultracold mixture are photoassociated into an excited triplet molecular state, which in turn is coupled to vibrational states of the triplet ground potential. Vibrational state binding energies, line strengths, and potential fitti...

Journal: :Journal of the American Chemical Society 2017
Clinton J Regan David P Walton Oliver S Shafaat Dennis A Dougherty

Mechanistic studies of a general reaction that decages a wide range of substrates on exposure to visible light are described. The reaction involves a photochemically initiated reduction of a quinone mediated by an appended thioether. After reduction, a trimethyl lock system incorporated into the quinone leads to thermal decaging. The reaction could be viewed as an electron-transfer initiated re...

1997
Ashutosh Misra R. J. Berry Paul Marshall

The geometries of IO, HCIO, ICH2O, CH3IO, CH3OI, CH2IOH, and ICH2OH have been obtained at the HF and MP2(FU)/6-31G(d) levels of ab initio theory, and the HF/6-31G(d) frequencies are compared with experimental assignments where these are available. The Gaussian-2 method was used to provide thermochemical data for use in atmospheric and combustion modeling. Transition states that connect these sp...

Journal: :FEBS letters 1979
M E Michel-Beyerle H Scheer H Seidlitz D Tempus R Haberkorn

The primary events in bacterial photosynthesis have been studied since it became possible [l] to isolate reaction centers of photosynthetic bacteria, e.g., of Rhodopseudomonas sphaeroides. Within <lO ps [2,3] after excitation of bacteriochlorophyll to its first excited singlet state, the radical pair state PF is formed consisting of a bacteriochlorophyll dimer cation (Bdhl); and a bacteriopheop...

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