Academy of Sciences of the Czech Republic

About: Academy of Sciences of the Czech Republic is a government organization based out in Prague, Czechia. It is known for research contribution in the topics: Population & Catalysis. The organization has 27866 authors who have published 71021 publications receiving 1821686 citations.

High Triplet Yield from Singlet Fission in a Thin Film of 1,3-Diphenylisobenzofuran

Abstract: Direct observation of triplet absorption and ground-state depletion upon pulsed excitation of a polycrystalline thin solid film of 1,3-diphenylisobenzofuran at 77 K revealed a 200 ± 30% triplet yield, which was attributed to singlet fission.

Cationic Gold(I) Complexes of Xenon and of Ligands Containing the Donor Atoms Oxygen, Nitrogen, Phosphorus, and Sulfur †

Abstract: Ligation of atomic gold(I) cation Au+ by various inorganic and organic ligands containing heteroatoms has been examined by experimental and theoretical means The Au(Xe)+ complex has been studied comprehensively by CCSD(T) calculations in order to provide a benchmark for a gold(I) cation affinity scale The best theoretical estimate of the binding energy is D0(Au+−Xe) = 301 kcal/mol This value is used to relate calculated and experimentally bracketed binding energies of Au(L)+ complexes with a relative gold(I) cation affinity scale for heteroatom ligands L, ie, Xe < C6F6 < H2O < CO < H2S < CH3CN ≈ C2H4 ≈ NH3 ≈ CH3NC < CH3SCH3 < PH3 In comparison to other transition metal cations, the gold(I) cation is unique in that the binding energies to several ligands are exceptionally large Further, the covalent character of the Au+−L bonds as well as charge transfer from the ligand to gold are significant Finally, the gas-phase behavior of Au+ suggests some implications for possible new approaches to gold(I)

Combination of searches for invisible Higgs boson decays with the ATLAS experiment

Abstract: Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H→invisible decays where H is produced according to the standard model via vector boson fusion, Z(ll)H, and W/Z(had)H, all performed with the ATLAS detector using 36.1 fb^{-1} of pp collisions at a center-of-mass energy of sqrt[s]=13 TeV at the LHC. In combination with the results at sqrt[s]=7 and 8 TeV, an exclusion limit on the H→invisible branching ratio of 0.26(0.17_{-0.05}^{+0.07}) at 95% confidence level is observed (expected).