Vibrational energy transfer from the first excited state 2252 cm−1 of the C–D stretch of deuterated chloroform DCCl3 to the 0-1 transition 2155 cm−1 of the CN stretch of phenyl selenocyanate C6H5SeCN in their 1:1 liquid mixture was observed with a pump/probe two-color two dimensional infrared spectroscopic technique. The mode-specific energy transfer can occur mainly because of the long vibrati...

Fundamental insight into the unique fluorescence and nucleobase-mimicking properties of the fluorescent nucleobase analogues of the tC family is not only vital in explaining the behaviour of these probes in nucleic acid environments, but will also be profitable in the development of new and improved fluorescent base analogues. Here, temperature-dependent fluorescence quantum yield measurements ...

The one-to-one clusters of the 2,5-lutidyl radical [2-CH3,5-(ĊH2)C5H3N] with Ar, N2, CH4, CF4, C2H6, C3H8, C4H10, and C2H4 are studied by fluorescence excitation spectroscopy, mass resolved excitation spectroscopy, and ab initio and semiempirical calculational techniques. Cluster binding energies for the ground (D0) and excited (D1) states, cluster spectroscopic shifts, and van der Waals cluste...

The ground-(S0) and excited-(S) and Ti) state spectra o f seven derivatives o f 9-acetoxy10(4'-acetoxy)phenylanthracene were determined in the region 50000 15000 cm -1 (200 — 660 nm). Comparison o f these spectra to the unsubstituted molecule (anthracene) indicates the presence o f bathochromic shift and the steric effect. The substituents cause changes o f positions of the energy levels (bigge...

In some nuclei along the drip-line, for example the exotic nuclei Be, an energy level inversion between the 2s1⁄2 and 1p1⁄2 states occurs. Interest in the mirror state of Be on the proton rich side, N, resulted in a continuation of an earlier study searching for resonances in this nucleus. This experiment involved the resonance scattering reaction C + p in inverse kinematics performed at the NS...

In intermediate energy nuclear collisions (E/A~50MeV), the nuclei collide and compress, forming what is called a compound nucleus. As the compound nucleus cools and expands, it breaks apart into multiple nuclei in a process called multi-fragmentation. These fragments then begin to cool by emitting small nuclei. The final products of decay are then observed in detectors. The populations of nucle...

The decomposition of 1,2-dioxetanone into a CO(2) molecule and into an excited state formaldehyde molecule was studied in condensed phase, using a density functional theory approach. Singlet and triplet ground and excited states were all included in the calculations. The calculations revealed a novel mechanism for the chemiluminescence of this compound. The triplet excitation can be explained b...

The triplet excited state behavior of c84 has been probed by the triplet-triplet energy transfer method using pulse radiolytically generated biphenyl triplets in benzene. The triplet excited state has a weak absorption in the UV (difference absorption maxima at 3 10 and 345 nm) but no significant absorption in the visible. The rate constants for energy transfer from 3BP* and 3C60* are 4 x lo9 a...

Light proton-rich bound and unbound nuclei were produced by means of stripping reactions of secondary beams of Mg and Ne. The decays of the unbound nuclei Na have been measured by detecting their decay products Ne and one proton and by performing an invariant-mass reconstruction. For Na, the present work is the first measurement of its decay. As the decay scheme of this nucleus could not be det...