Abstract: The present invention relates to a new type of low-dimensional hybrid post-perovskites for high efficiency white light emission. More precisely, the invention relates to a one dimensional post-perovskite of formula AaMmXx.yH2O wherein A is a cis- or trans-2,5-dialkylpiperazine derivative bearing C1-C3 linear or branched alkyl groups, M is one or more metal, X one or more halogen, 0<a<5, 1<m<2, 2<x<12, 0<y. The invention also relates to material and luminescent device comprising the same and methods of preparation of the of low-dimensional hybrid post-perovskites.

Abstract: A uretero-renoscope assembly comprises a first shaft to accommodate an optical system and an auxiliary instrument passage, this first shaft being connected at its proximal end to a housing provided with connections for a light conductor cable and for the infeed or discharge of flushing fluid or the like. The first shaft has a cross-sectional area which decreases in steps in the distal direction, and has a circular cross-section at its proximal end which merges into an oval cross-section at the distal end. A second shaft of circular cross-section can be pushed onto the first, with the first shaft in position in the ureter after withdrawal of the uretero-renoscope, forming a further stepped increase in cross-section and providing a further passage, for example for flushing fluid.