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Yutkin, M.P.,Zavakhina, M.S.,Samsonenko, D.G.,Dybtsev, D.N.,Fedin, V.P. Elsevier Sequoia [etc.] 2013 Inorganica chimica acta Vol.394 No.-
Three new homochiral metal-organic frameworks (MOFs) based on malate anions and N-donor linkers of different length have been prepared. [Co<SUB>2</SUB>(mal)<SUB>2</SUB>(bpy)].2H<SUB>2</SUB>O (1), [Ni<SUB>2</SUB>(mal)<SUB>2</SUB>(bpy)].2H<SUB>2</SUB>O (2), [Ni<SUB>2</SUB>(mal)<SUB>2</SUB>(bpe)].3H<SUB>2</SUB>O (3) (mal=S-malate, bpy=4,4'-bipyridyl, bpe=trans-1,2-bis(4-pyridyl)ethylene) were characterized by a number of analytical methods including single crystal X-ray analysis. Optical purity of compounds 2 and 3 was confirmed by polarimetry experiments. Compounds 1 and 2 contribute to the family of isoreticular M(II) malates and aspartates ([M<SUB>2</SUB>(asp)<SUB>2</SUB>L] and [M<SUB>2</SUB>(mal)<SUB>2</SUB>L], M=Cu, Co, Ni; L=ditopic rigid organic ligand) where all structural units (metal cations, chiral ligands and bridging ligands) could be changed with retention of the topology in the resulting framework. Compound 3 has a different structure and contributes to a different family of isoreticular homochiral MOFs.
Enantioselective sorption of alcohols in a homochiral metal–organic framework
Suh, Kyungwon,Yutkin, Maxim P.,Dybtsev, Danil N.,Fedin, Vladimir P.,Kim, Kimoon The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.4
<p>Single-crystal X-ray diffraction study reveals the host–guest interactions between a homochiral metal–organic framework and two enantiomers of a chiral alcohol providing the key driving force for the enantioselective sorption of alcohols in the framework.</p> <P>Graphic Abstract</P><P>Single-crystal X-ray diffraction study reveals enantioselective recognition <I>via</I> H-bond interaction between a chiral substrate and an enantiopure porous metal–organic framework. <img src='http://pubs.rsc.org/ej/CC/2011/c1cc16209h/c1cc16209h-ga.gif'> </P>
Itay M. Sabler,Ioannis Katafigiotis,Stavros Sfoungaristos,Amitay Lorber,Ioannis Leotsakos,Vladimir Yutkin,Guy Hidas,Ofer N. Gofrit,Mordechai Duvdevani 대한비뇨의학회 2019 Investigative and Clinical Urology Vol.60 No.1
Purpose: To compare percutaneous nephrolithotomy (PCNL) operations between patients with a preoperative nephrostomy tube and patients that the renal access was obtained at the time of the surgery. Materials and Methods: We retrospectively evaluated PCNL cases. Patients were divided into two groups. Group 1 – a non-nephrostomy tube (percutaneous nephrostomy, PCN) group and Group 2 – patients with a PCN placed before the procedure. All preoperatively placed PCN's were performed in emergency situations by interventional radiologists (IR). Complications were classified according to the Clavien-Dindo classification. We compared stone characteristics, operation time, complications, efficacy and PCN usability at surgery. Results: Five hundred twenty-seven patients who were submitted to PCNL for renal stones were included in the study. In 73 patients (13.9%) the PCNs were placed before the surgery. Patients and stone characteristics, mean operative time (p=0.830), complications (p=0.859) and stone-free rates (93.0%) were similar between the groups. There was a trend toward higher complication rates in Group 1, but the difference was not statistically significant. Only 21 (29.0%) of preoperatively placed PCNs were used during PCNL for establishing a tract. The reasons for not using PCN tract were: pelvic or infundibular insertion (30.0%) and suboptimal anatomic location (70.0%). Conclusions: Preoperative emergency inserted PCNs by IR usage rates were low during PCNL. Its placement neither affects the incidence of complications nor affects the operation time and outcomes. As such, when emergency renal drainage is indicated, the need for a future definitive PCNL should not influence the decision about the modality of renal drainage.