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Matthew D King et al.
The journal of physical chemistry. A, 115(34), 9467-9478 (2011-03-31)
Cocrystallized adenine and thymine derivatives, along with the pure monomeric crystals, were investigated by terahertz spectroscopy and solid-state density functional theory (DFT). The methylated nucleobase derivatives crystallize in planar hydrogen-bonded adenine-thymine pairs similar to the manner found in DNA. The
Alexander Egger et al.
Inorganic chemistry, 44(1), 122-132 (2005-01-04)
Reactions of the complex trans-[RuCl(4)(Hind)(2)](-) (Hind = indazole), which is of clinical relevance today, with both the DNA model nucleobase 9-methyladenine (made) and the thioethers R(2)S (R = Me, Et), as models of the methionine residue in biological molecules possibly
Yuliang Yang et al.
Chemistry, an Asian journal, 13(19), 2923-2933 (2018-08-14)
A family of novel imine-N-heterocyclic carbene ruthenium(II) complexes of the general formula [(η6 -p-cymene)Ru(C^N)Cl]PF6- (where C^N is an imine-N-heterocyclic carbene chelating ligand with varying substituents) have been prepared and characterized. In this imine-N-heterocyclic carbene chelating ligand framework, there are three
Tímea Mihály et al.
Inorganic chemistry, 51(19), 10437-10446 (2012-09-13)
Several di- and trinuclear metal complexes consisting of the model nucleobase 9-methyladenine (9-MeA) or its mono-deprotonated form (9-MeA(-)) and monofunctional (dien)Pd(II), (dien)Pt(II), (NH(3))(3)Pt(II), or (trpy)Pd(II) in different combinations have been prepared and/or studied in solution by NMR spectroscopy: [{Pd(dien)}(3)(9-MeA(-)-N1,N6,N7)]Cl(3.5)(PF(6))(1.5)·3H(2)O (1)
Gydo C P van Zundert et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 12(10), 1921-1927 (2011-05-28)
IR spectroscopy is employed to study isolated adenine and its derivative 9-methyladenine in both their neutral and protonated forms. The IR spectra of neutral adenine and 9-methyladenine are measured in a molecular beam expansion via IR-UV ion-dip spectroscopy in the
Diego Montagner et al.
Dalton transactions (Cambridge, England : 2003), 40(34), 8664-8674 (2011-07-29)
The amidine complexes cis-[L(2)PtNH==C(R){1-MeCy(-2H)}]NO(3) (R = Me, 1a; Ph, 1b, Me(3)C, 1c; Ph(2)(H)C, 1d) and cis-[L(2)PtNH==C(R){9-MeAd(-2H)}]NO(3) (R = Me, 2a; Ph, 2b; Me(3)C, 2c; Ph(2)(H)C, 2d), are formed when cis-[L(2)Pt(μ-OH)](2)(NO(3))(2) (L = PPh(3)) reacts with 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd)
Pilar Amo-Ochoa et al.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 12(4), 543-555 (2007-02-21)
Guanine-guanine hydrogen bonding involving the Watson-Crick edge [N(1)H, N(2)H2] of one base and the Hoogsteen edge (N7, O6) of the other is the dominant association pattern in the solid-state structures of two hydrates of 9-ethylguanine (9-EtGH), and in adducts of
The neutron crystal structure of 9-methyladenine at 126 K.
McMullan RK, et al.
Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials, 36(6), 1424-1430 (1980)
Dunja Radisic et al.
Journal of the American Chemical Society, 127(17), 6443-6450 (2005-04-28)
The anionic base pairs of adenine and thymine, (AT)(-), and 9-methyladenine and 1-methylthymine, (MAMT)(-), have been investigated both theoretically and experimentally in a complementary, synergistic study. Calculations on (AT)(-) found that it had undergone a barrier-free proton transfer (BFPT) similar
Jirí Cerný et al.
Chemical communications (Cambridge, England), 46(3), 383-385 (2010-01-13)
The transition structures (TS) between H-bonded (H) and stacked (S) structures of 9-methyladenine...1-methylthymine and 9-methylguanine...1-methylcytosine base pairs were localized at the DFT-D/TZVP potential energy surface. The energy barrier between the S and TS structures is considerably higher for the former
Bruno Longato et al.
Inorganic chemistry, 45(4), 1805-1814 (2006-02-14)
The hydroxo complex cis-[L2Pt(mu-OH)]2(NO3)2, (L = PMePh2, 1a), in CH3CN solution, deprotonates the NH2 group of 9-methyladenine (9-MeAd) to give the cyclic trinuclear species cis-[L2Pt[9-MeAd(-H)]]3(NO3)3, (L = PMePh2, 2a), in which the nucleobase binds the metal centers through the N(1)
Clélia Canuel et al.
Physical chemistry chemical physics : PCCP, 8(34), 3978-3987 (2006-10-10)
The excited state dynamics of the purine base 9-methyladenine (9Me-Ade) has been investigated by time- and energy-resolved photoelectron imaging spectroscopy and mass-selected ion spectroscopy, in both vacuum and water-cluster environments. The specific probe processes used, namely a careful monitoring of
Yu Tang et al.
Talanta, 222, 121500-121500 (2020-11-11)
Alkylated DNA adducts are the most important and common form of DNA damage at the molecular level. In addition to known alkylated DNA adducts, many unknown DNA adducts remain to be discovered. A prediction-driven MRM profiling MS strategy has been
Mauro Freccero et al.
The Journal of organic chemistry, 70(18), 7098-7106 (2005-08-27)
Several catalyzed alkylation reactions of 9-methyladenine by a model [CPI, cyclopropa[c]pyrrolo[3,2-e]indol-4(5H)-one (1)] of duocarmycin anticancer drugs have been compared to the uncatalyzed reaction in gas phase and in water solvent bulk, using density functional theory at the B3LYP level with
Sulayman A Oladepo et al.
The journal of physical chemistry. B, 115(19), 6149-6156 (2011-04-23)
The photophysics and photochemistry of nucleobases are the factors governing the photostability of DNA and RNA, since they are the UV chromophores in nucleic acids. Because the formation of photoproducts involves structural changes in the excited electronic state, we study
Excited state spectroscopy and dynamics of isolated adenine and 9-methyladenine.
Luhrs DC, et al.
Physical Chemistry Chemical Physics, 3(10), 1827-1831 (2001)
Diego Montagner et al.
Inorganic chemistry, 49(5), 2103-2110 (2010-02-09)
Deprotonation of 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd) promoted by cis-[L(2)Pt(mu-OH)](2)(NO(3))(2) (L = PPh(3), PMePh(2), (1)/(2)dppe) in PhCN causes the irreversible insertion of a nitrile molecule into the Pt-N4 and Pt-N6 bonds of the cytosinate and adeninate ligands, respectively, to form
Christer Z Bisgaard et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 10(1), 101-110 (2008-11-15)
We present a summary of recent advances in the understanding of the UV photophysics of the isolated DNA base adenine, emphasizing a discussion of the mechanisms behind the ultrafast relaxation following excitation to the pipi* band. Drawing on our femtosecond
Kamil Mazurkiewicz et al.
Journal of the American Chemical Society, 129(5), 1216-1224 (2007-02-01)
Photoelectron spectra of adenine-formic acid (AFA(-)) and 9-methyladenine-formic acid (MAFA(-)) anionic complexes have been recorded with 2.540 eV photons. These spectra reveal broad features with maxima at 1.5-1.4 eV that indicate formation of stable valence anions in the gas phase.
Iryna N Stepanenko et al.
Inorganic chemistry, 47(16), 7338-7347 (2008-07-04)
Reactions of (H 2azole) 2[OsCl 6], where Hazole = pyrazole, Hpz, ( 1), indazole, Hind, ( 2), imidazole, Him, ( 3) and benzimidazole, Hbzim, ( 4) with the corresponding azole heterocycle in 1:4 molar ratio in boiling isoamyl alcohol or
Susana Ibáñez et al.
Inorganic chemistry, 50(20), 10439-10447 (2011-09-24)
The synthesis and characterization of three heteronuclear Pt(2)Pd(2) (4, 5) and PtPd(2) (6) complexes of the model nucleobase 9-methyladenine (9-MeA) is reported. The compounds were prepared by reacting [Pt(NH(3))(3)(9-MeA-N7)](ClO(4))(2) (1) with [Pd(en)(H(2)O)(2)](ClO(4))(2) at different ratios r between Pt and Pd
Szymon Smolarek et al.
Physical chemistry chemical physics : PCCP, 12(48), 15600-15606 (2010-08-03)
High-resolution absorption spectra of adenine, 9-methyladenine and 2-aminopurine in helium nanodroplets have been recorded. In contrast to molecular beam experiments, large variations in linewidths are observed for adenine and 9-methyladenine. At the same time, the spectrum of 2-aminopurine remains sharp
Yevgeniy Nosenko et al.
Physical chemistry chemical physics : PCCP, 12(4), 863-870 (2010-01-13)
We present femtosecond multiphoton ionization detected infrared spectra of jet-cooled monohydrates of adenine and 9-methyladenine. By quantum chemical vibrational analysis and comparison with available literature data we identified two isomers of adenine hydrate with one water molecule hydrogen-bonded to either
Karel D Klika et al.
Chemical communications (Cambridge, England), (6)(6), 666-667 (2004-03-11)
Stepwise migration of coordinated Pt(II) from the endocyclic N1 site to the exocyclic amino group occurs in the bis(9-methyladenine-N1) complex of cis-Pt(II)(NH(3))(2) in basic solution, whereafter deamination of the 9-methyladenine still coordinated at N-1 competes with a second migration step.
Tomomi Noguchi-Yachide et al.
Bioorganic & medicinal chemistry, 23(5), 953-959 (2015-02-14)
Bromodomain and extra-terminal domain (BET) proteins are epigenetic readers that bind to acetylated lysines in histones. Among them, BRD4 is a candidate target molecule of therapeutic agents for diverse diseases, including cancer and inflammatory disease. As a part of our
Mahmoud Mirzaei et al.
The journal of physical chemistry. A, 110(14), 4833-4838 (2006-04-08)
Hydrogen-bonding effects in the real crystalline structure of 9-methyladenine, 9-MA, were studied using calculated electric field gradient, EFG, and chemical shielding, CS, tensors for nitrogen and hydrogen nuclei via density functional theory. The calculations were carried out at the B3LYP
Piotr Storoniak et al.
The journal of physical chemistry. B, 114(34), 11353-11362 (2010-08-13)
The photoelectron spectrum for (1-methylthymine)-(9-methyladenine)...(formic acid) (1MT-9MA...FA) anions with the maximum at ca. 1.87 eV was recorded with 2.54 eV photons and interpreted through the quantum-chemical modeling carried out at the B3LYP/6-31+G(d,p) level. The relative free energies of the anions
Jann A Frey et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 7(7), 1494-1499 (2006-06-07)
2-Pyridone (pyridin-2-one) is a mimic of the uracil and thymine nucleobases, with only one N--H and C==O group. It provides a single H-bonding site, compared to three for the canonical pyrimidine nucleobases. Employing the supersonically cooled 9-methyladenine2-pyridone (9MAd x 2PY)
Chris T Middleton et al.
The journal of physical chemistry. A, 111(42), 10460-10467 (2007-10-04)
Vibrational cooling by 9-methyladenine was studied in a series of solvents by femtosecond transient absorption spectroscopy. Signals at UV and near-UV probe wavelengths were assigned to hot ground state population created by ultrafast internal conversion following electronic excitation by a
O Dolgounitcheva et al.
The journal of physical chemistry. A, 113(52), 14630-14635 (2009-07-15)
Vertical ionization energies of 9-H adenine and 9-methyl adenine have been calculated with the following, ab initio, electron propagator methods: the outer valence Green's function (OVGF), partial third-order theory (P3), and the third-order algebraic diagrammatic construction, or ADC(3). Basis set
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