E. Velcheva

发表

Structural changes caused by the conversion of 2-hydroxybenzamide (salicylamide) into the oxyanion

B. Stamboliyska, E. Velcheva, 2008 .

IR spectral and structural changes caused by the conversion of 3-methoxy-4-hydroxybenzaldehyde (vanillin) into the oxyanion.

B. Stamboliyska, E. Velcheva, 2004, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

Analytical studies of the Alexandrovo Thracian tomb wall paintings.

V. Todorov, V. Petkova, G. Lalev, 2016, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

Characterization of Zahari Zograph’s nave wall paintings in the church “The nativity of the virgin” of Rila Monastery (Bulgaria) by vibrational spectroscopy and SEM–EDX analysis

D. Fischer, A. Lederer, B. Stamboliyska, 2017 .

Anion and radical anion products of flutamide studied by IR spectra and density functional calculations

B. Stamboliyska, D. Yancheva, E. Velcheva, 2022, Journal of Molecular Structure.

Computational and experimental studies on the IR spectra and structure of the simplest nitriles (C1 and C2), their anions, and radicals

M. Georgieva, E. Velcheva, 2006 .

Insights in the radical scavenging mechanism of syringaldehyde and generation of its anion

A. Šmelcerović, B. Stamboliyska, D. Yancheva, 2016 .

DFT and experimental studies of the structure and vibrational spectra of curcumin

M. Spiteller, T. Kolev, B. Stamboliyska, 2005 .

The experimental and computational study on the IR spectra and structure of pyridine-3-carboxamide (nicotinamide)-d0 and -d2

E. Velcheva, L. Daskalova, 2005 .

IR studies in the substituted benzaldehyde series provide a new definition of sigma-plus constants of ionic substituents.

I. Binev, E. Velcheva, I. Juchnovski, 2003, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

Infrared spectra and structure of isomeric (cyanophenyl)acetonitriles and their carbanions: an ab initio force field treatment

J. Tsenov, I. Binev, E. Velcheva, 1996 .

On the validity of the constants of ionic substituents. Substituent effects on the cyano stretching frequencies and intensities of trans-α-phenyl-β-arylacrylonitriles

I. Binev, E. Velcheva, I. Juchnovski, 1995 .

Infrared spectra and structure of phenylacetonitrile and of its carbanion: an ab initio force field treatment

J. Tsenov, I. Binev, E. Velcheva, 1995 .

Experimental and DFT studies on IR spectral and structural changes arising from the conversion of 1H-indole-2,3-dione (isatin) into azanion

I. Binev, E. Velcheva, P. J. Vassileva-Boyadjieva, 2008 .

IR spectral and structural changes caused by the conversion of 3-hydroxybenzaldehyde into the oxyanion.

I. Binev, B. Stamboliyska, E. Velcheva, 2003, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

Vibrational spectra of 3-benzylidenephthalide and its 18O-labelled derivative

T. Kolev, E. Velcheva, I. Juchnovski, 1999 .

The infrared spectra and structure of o-sulfobenzimide (saccharin) and of its nitranion: An ab initio force field treatment

I. Binev, B. Stamboliyska, E. Velcheva, 1996 .

IR spectra and structure of 1-H-isoindole-1,3(2H)-dione (phthalimide), cis-hexahydro-1-H-isoindole-1,3(2H)-dione (hexahydrophthalimide) and of their nitranions

J. Tsenov, Y. Binev, I. Binev, 1999 .

Combined infrared spectroscopic and computational study on simpler capsaicin derivatives and their anion intermediates in the scavenging of free radicals

B. Stamboliyska, D. Yancheva, E. Velcheva, 2020 .

IR spectral and structural studies of 4‐aminobenzenesulfonamide (sulfanilamide)‐d0, ‐d4, and ‐15N, as well as their azanions: Combined DFT B3LYP/experimental approach

M. Georgieva, E. Velcheva, O. Petrov, 2007 .

IR spectra and structure of 4-hydroxybenzylidenemalononitrile, its oxyanion, cyanide adduct and adduct-oxyanion: experimental and ab initio studies

Y. Binev, E. Velcheva, M. Petrova, 1999 .

Changes in the IR spectra and structures of pyridine-3-carboxamides-d0 and -d2 caused by their conversion into azanions-d0 and -d1: Experimental and computational studies

E. Velcheva, L. Daskalova, I. G. Binev, 2007 .

The altar wall paintings of the catholicon "The Nativity of the Virgin", Rila Monastery, Bulgaria: Identification of the painting materials by means of vibrational spectroscopic techniques complemented by EDX, XRD and TGA analysis.

G. Lalev, B. Stamboliyska, D. Yancheva, 2020, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

DFT and experimental study on the IR spectra and structure of acesulfame sweetener

B. Stamboliyska, E. Velcheva, A. Popova, 2012 .

DFT and experimental study on the IR spectra and structure of 2-hydroxy-3-methoxybenzaldehyde (o-vanillin) and its oxyanion

B. Stamboliyska, E. Velcheva, P. Boyadjieva, 2010 .

4- And 3- hydroxyacetophenones : experimental and computational studies on their conversions into oxyanions

Y. Binev, E. Velcheva, P. J. Vassileva-Boyadjieva, 2005 .

Materials and Techniques of the Mural Paintings in the Church-Ossuary of the Rila Monastery, Bulgaria

M. Guncheva, B. Stamboliyska, D. Yancheva, 2024, Minerals.