Photoinduced formation of a platina-α-lactone - a carbon dioxide complex of platinum. Insights from femtosecond mid-infrared spectroscopy.

The binding of carbon dioxide to a transition metal is a complex phenomenon that involves a major redistribution of electron density between the metal center and the triatomic ligand. The chemical reduction of the ligand reveals itself unambiguously by an angular distortion of the CO-molecule as a result of the occupation of an anti-bonding π-orbital and a shift of its antisymmetric stretching vibration, ν, to lower wavenumbers. Here, we generate a carbon dioxide complex of the heavier group-10 metal, platinum, by ultrafast electronic excitation and cleavage of CO from the photolabile oxalate precursor, oxaliplatin, and monitored the ensuing primary dynamics with ultrafast mid-infrared spectroscopy.

Cortical coding of gustatory and thermal signals in active licking mice.

Eating behaviours are influenced by the integration of gustatory, olfactory and somatosensory signals, which all contribute to the perception of flavour. Although extensive research has explored the neural correlates of taste in the gustatory cortex (GC), less is known about its role in encoding thermal information. This study investigates the encoding of oral thermal and chemosensory signals by GC neurons compared to the oral somatosensory cortex.

PICC Lines in Pregnancy and Other Peripartum Vascular Access Considerations.

Importance: To decrease associated infectious and thrombotic morbidity, it is important to understand the indications and risks of peripherally inserted central catheters (PICCs) and other vascular access means in pregnancy.

Objectives: The objectives are 3-fold: (1) discuss indications and contraindications, approach to placement, and associated complications for PICC lines, arterial catheters, centrally inserted central catheters, and peripheral intravenous catheters; (2) review available data regarding complications associated with these catheters in pregnancy; and (3) propose an evidence-based approach to clinical decision making regarding vascular access in 2 clinical scenarios among pregnant patients.

Evidence Acquisition: A literature review identified relevant research, review articles, textbook chapters, databases, and societal guidelines, with a focus on obstetrical anesthesia and obstetric literature.

Low Temperature Emissive Cyclometalated Cobalt(III) Complexes.

A series of Co complexes [Co(ImP)][PF], with HImP = 1,1'-(1,3-phenylene)bis(3-methyl-1-imidazole-2-ylidene)) and R = Me, Et, Pr, Bu, is presented in this work. The influence of the strong donor ligand on the ground and excited-state photophysical properties was investigated in the context of different alkyl substituents at the imidazole nitrogen. X-ray diffraction revealed no significant alterations of the structures and all differences in the series emerge from the electronic structures.