Szilárdfázisú szupramolekuláris reakciók = Solid state supramolecular reactions

Előállítottunk 24 vegyületet, ezek közül 17 kristályszerkezetet határoztunk meg. 6 esetben figyeltünk meg Piedfort képződést, három esetben találtunk asszociátumot. A C60 és C70 kokrisztallizációja egy esetben új módosulatot, a p-Br es p-Cl vegyületek esetében a fullerén új komplexét, illetve zárványát adta. A trisz(p-jódfenoxi)-triazin a Magyarországon mért legkisebb szerves kristály (10 mikron). Ab initio szerkezetmeghatározási módszert alkalmaztunk (''charge-flipping''). A vendég-molekulák cserereakcióinak elemi lépésre bontásaként a kristályszerkezet ''bomlását'' eliminációs reakcióként látjuk. A metil-etil-ketont (MEK) tartalmazó izoftálsav-származék kristály hasonló rendezetlenséget mutat, mint az etilacetát-MEK keverék, szemben a rendezett dietil-ketonból növesztettel. A C--H ... O hidrogénhidak szeepét taglaló cikk, ill. predikció eredményeként megkezdtük foszfolének szerkezetvizsgálatát. Első eredmény egy víz molekulát tartalmazó asszociátum izolálása és leírása. A Meloxicam:mannóz kokrisztallizációból nyert apró kristályokat a drug triklin formájaként azonosítottuk. Szilárdfázisú reakciót igazoltunk ribóz származékok és alkáli sók közt. A komponensek őrlésével is igazoltuk, hogy e komplexek ''zöld kémiai'' uton előállíthatóak. Ezek némelyike élettani jelentőségű lehet. A szintéziseken túl elvégeztük 3 tucat kristály szerkezetmeghatározását. Eddig 14 cikk jelent meg (IF összeg kb. 30), tartottunk 4 meghívott előadást és közel egy tucat posztert. | We have prepared 24 new compound, 17 of which was characterized by XRD. In 6 cases we observed Piedfort formation, in 3 we found associations. Co-crystallization with C60 and C70 yielded to new polymorphs and new inclusions in the cases of the p-Br and p-Cl derivatives. Tris-p-iodophenoxy-triazine is the smallest organic crystal ever measured in Hungary (10 micron). We applied new ab initio structure solution methods (charge flipping). Guest exchange reactions were disassembled into elementary steps and decomposition of inclusions is seen as the elimination reactions do. An isophtalic acid derivative inclusion with methyl-ethyl keton shows similiar disorder to the one obtained from MEK / ethyl acetate mixture while diethyl keton inclusion is perfectly ordered. Apaper alluding to the role of C-H..O H-bridges and prediction led to structure determination of some phospholenes. Firts result was the isolation and description of a water adduct. Crystal structure of a cocrystallized meloxicam:mannose mixture was identified as the triclinic drug form. We confirmed a solid state reaction between riboise derivatives and alkaline salts. Milling of the components proved that these can be easily prepared by ''green chemistry''. Some of these might be physiological importance. Apart from the synthetic work we did about 3 dozens of crystal structure determinations, also published 14 papers (impact factor sum ca. 30) hitherto, had 4 invited lectures and some 12 posters

Synthesis, Structural, DFT, and Cytotoxicity Studies of CuII and NiII Complexes with 3-Aminopyrazole Derivatives

Template synthesis of N,N 0-bis(4-acetyl-5-methylpyrazole-3-yl)formamidine (ampf) was performed starting from 4-acetyl-3- amino-5-methylpyrazole (aamp) andCH(OC2H5)3 in methanol in the presence of CuCl2, Cu(NO3)2, orNi(NO3)2. The ligand was isolated in coordinated form as [Cu(ampf )Cl2], [Cu(ampf )(MeOH)(NO3)2]MeOH, and [Ni(ampf )(MeOH)2(NO3)]NO3 correspondingly. The compounds were characterized by elemental analysis, Fourier-transform IRand electronic spectroscopy, thermal analysis, single-crystal X-ray diffraction, and quantumchemical (density functional theory) calculations. The density functional theory calculations provided information on the metal�ligand interactions in the complexes and assisted the assignment of the FT-IR spectra. The antiproliferative activity of the complexes and the ligand precursor, aamp, was tested against human myelogenous leukaemia K562, colon adenocarcinoma HT29, and cervix carcinoma HeLa.JRC.E.3 - Materials researc

Protective Effect of Prunus Cerasus (Sour Cherry) Seed Extract on the Recovery of Ischemia/Reperfusion-Induced Retinal Damage in Zucker Diabetic Fatty Rat

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Heme oxygenase-1 activity as a correlate to exercise-mediated amelioration of cognitive decline and neuropathological alterations in an aging rat model of dementia

Alzheimer’s disease (AD) is a neurodegenerative disorder with cognitive impairment. Physical exercise has long been proven to be beneficial in the disorder. The present study was designed to examine the effect of voluntary exercise on spatial memory, imaging, and pathological abnormalities. Particular focus has been given to the role of heme oxygenase 1 (HO-1) – an important cellular cytoprotectant in preserving mental acuity – using an aging rat model of dementia. Male and female Wistar rats were segregated into six groups, including (i) aged sedentary (control) females (ASF, n=8); (ii) aged sedentary (control) males (ASM, n=8); (iii) aged running females (ARF, n=8); (iv) aged running males (ARM, n=8); (v) young control females (YCF, n=8); and (vi) young control males (YCM, n=8). Rats in the ARF and ARM groups had free access to a standardised inbuilt running wheel during the 3-month evaluation period. Spatial memory was investigated using the Morris Water Test, imaging and pathological alterations were assessed using positron emission tomography (PET) imaging and histopathological examinations (H&E, Congo red staining), respectively, and HO-1 enzyme activity assays were also conducted. The outcomes suggest that voluntary physical exercise mitigates impaired spatial memory and neuropathological changes exhibited by the aging sedentary group, via elevated HO-1 activity, contributing to the antioxidant capacity in the aging brain

Alpha-MSH induces vasodilatation and exerts cardioprotection via the heme-oxygenase pathway in rat hearts

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