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Mariana Mitewa

Bio: Mariana Mitewa is an academic researcher from Sofia University. The author has contributed to research in topics: Ligand & Denticity. The author has an hindex of 18, co-authored 138 publications receiving 1395 citations. Previous affiliations of Mariana Mitewa include Bulgarian Academy of Sciences & University of Zagreb.


Papers
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TL;DR: In this paper, a slow redox process is described for a green monomeric system with a marked decrease of plI and I s s e n s i t i v e t i c and i s s i c e a c i d i t o t h e a C i d I t y, t o T h e n a t u r e r e of t H e s o l v e n t (1120, D,O or organic S o l V E n t ) and the presence of O2 as wel l
Abstract: A b s t r a c t The i n t e r a c t i o n of P t ( I 1 ) with c r e a t i n i n e i s s t u d i e d i n d i f f e r e n t r e a c t i o n c o n d i t i o n s . A t L:M r a t i o from 4 t o 10 s e v e r a l new complexes of P t ( I 1 ) a r e o b t a i n e d , s t u d i e d by s p e c t r o s c o p i c methods and X-ray d i f f r a c t i o n . I n these monomer i c s p e c i e s the l i g a n d i s coord ina ted only through the endogenic n i t r o g e n . A t L:M = 1 a slow redox process t a k e s p l a c e leat i ing t o the format ion of s e v e r a l ( n e u t r a l , a n i o n i c and cat i o n i c ) b l u e t o green paramacne t i c s p e c i e s . The process proceeds on with a marked decrease of plI and i s s e n s i t i v e t o t h e a c i d i t y , t o t h e n a t u r e of t h e s o l v e n t (1120, D,O or organic s o l v e n t ) and t o t h e presence of O2 as wel l . A-green monomeric s p e c i e s was i s o l a t e d and s t u d i e d by X-ray s t r u c t u r a l a n a l y s i s .

18 citations

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TL;DR: In this article, the complex formation of styryl dyes was investigated spectrophotometrically in acetonitrile and the estimated log Kst values were found to be: 1 + Ca(ClO 4 ) 2, 1·78 + 0·05; 1 + Ba(C4O 4 ), 1·25+ 0·02; 2 + C4O4 ) 2, 1·72 + 0.02;

18 citations

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TL;DR: The results of the study indicated that the temperature is the main storage factor affecting diazepam stability, and further experiments on benzodiazepines stability at different storage conditions or in combination of different factors should be undertaken in forensic toxicology.

16 citations

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TL;DR: In this article, three Ni(II)-creatinine complexes are synthesized in organic media and it is proved that the complexes are formed only in nonaqueous media and their dissolution in water is connected with immediate dissociation.

16 citations

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TL;DR: In this article, the synthesis of copper complexes with cyclopentanespiro-5-dithiohydantoin and cyclohexane-sphara-5dithiones was reported.

16 citations


Cited by
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1,365 citations

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882 citations

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TL;DR: The spectrum of gold complexes described as antiproliferative compounds comprises a broad variety of different species including many phosphine complexes as well as gold in different oxidation states.

700 citations

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TL;DR: This contribution aims at an elucidation of some of the underlying principles of heavy and transition metal ion-enhanced emission by analyzing various systems published by other researchers as well as own work.

494 citations

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TL;DR: Guanidines have attracted increasing attention as electronically and sterically flexible ligands as mentioned in this paper, exhibiting a variety of coordination modes and a range of donor properties leading to compatibility with a remarkably wide range of metal ions from all parts of the periodic table.

476 citations