Dumbbells of five-connected Ge atoms and superconductivity in CaGe3

CaGe(3) has been synthesized at high-pressure, high-temperature conditions. The atomic pattern comprises intricate germanium layers of condensed moleculelike dimers. Below T(c) = 6.8 K, type II superconductivity with moderately strong electron-phonon coupling is observed.     

Metal-DNA Interaction in vivo and in vitro Investigation

The content of various metals Ni, Cr,Cd, Pb, Fe, Cu, Mg, Ca, Zn were determined in the DNA samples from cells C3HA mice liver and ascitic hepatoma 22A by the method ICP-AES. The results are presented in Table 1.     

A Highly Stable Organic Luminescent Diradical

It is very challenging to obtain stable room-temperature luminescent open-shell singlet diradicals. Herein we report the first stable Müller's hydrocarbon TTM-PhTTM with luminescent properties. Variable-temperature electron paramagnetic resonance spectroscopy measurements and theoretical calculations show that TTM-PhTTM has an open-shell singlet ground state with a diradical character of 90 %. Because of a small singlet-triplet energy gap, the open-shell singlet ground state can be thermally excited to a triplet state. TTM-PhTTM shows room-temperature deep-red emission in various solutions. Unusually high stability of TTM-PhTTM was also observed owing to effective steric hindrance and spin delocalization. Our results are beneficial to the rational design and discovery of more stable luminescent diradical materials.     

ChemInform Abstract: ThPt2: A new Representative of Close Packed Tetragonal Structures.

The crystal and electronic structure, chemical bonding, and physical properties of ThPt₂ are characterized by powder XRD, magnetic, electrical resistivity and specific heat measurements, and by DFT scalar-relativistic electronic structure calculations.