Investigation of optical band gap in pyrrolidinomethylphthalimide crystal

Shankar, G.; Joseph, P. S.; Suvakin, M. Yosuva; Sebastiyan, A.

doi:10.1016/j.physb.2010.07.016

Cited by 20 publications

(4 citation statements)

References 20 publications

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“…5. Assuming that the excitation coefficient is negligible [32] we have: Figs. 6-8 demonstrate reflectance (R), transmittance (T) and absorbance (A) spectra of VOx1, VOx2 and VOx3, respectively.…”

Section: Resultsmentioning

confidence: 99%

Structural And Optical Properties Of VOx Thin Films

Schneider

2015

Archives of Metallurgy and Materials

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VO x thin films were deposited on Corning glass, fused silica and Ti foils by means of rf reactive sputtering from a metallic vanadium target. Argon-oxygen gas mixtures of different compositions controlled by the flow rates were used for sputtering. Influence of the oxygen partial pressure in the sputtering chamber on the structural and optical properties of thin films has been investigated.Structural properties of as-sputtered thin films were studied by X-ray diffraction at glancing incidence, GIXD. Optical transmittance and reflectance spectra were recordedwith a Lambda 19 Perkin-Elmer double spectrophotometer. Thickness of the films was determined from the profilometry. It has been confirmed by XRD that the deposited films are composed mainly of V 2 O 5 phase. The estimated optical band gap of 2.5 eV corresponds to V 2 O 5 .Keywords: VO x thin films, reactive sputtering, microstructure, optical properties, energy band gap Cienkie warstwy VO x były nanoszone na szkło Corning metodą rozpylania magnetronowego rf. Jako katody użyto metalicznego wanadu. Były one nanoszone w komorze wypełnionej mieszaniną argonu i tlenu w różnych proporcjach przy ustalonych przepływach. Zbadano wpływ ciśnienia parcjalnego tlenu w komorze na własności strukturalne i optyczne otrzymanych warstw.Własności strukturalne cienkich warstw zostały określone metodą rozpraszania promieniowania rentgenowskiego padają-cego pod małymi kątami (GIXD). Widma optyczne transmitancji i odbicia zostały wykonane przy użyciu spektrometru Lambda 19 Perkin-Elmer. Grubość badanych warstw zmierzono za pomocą profilometru.Pomiary XRD potwierdziły, że otrzymane warstwy składają się głównie z fazy V 2 O 5 . Wyznaczona optycznie przerwa energetyczna wynosząca 2.5 eV odpowiada przerwie energetycznej V 2 O 5 .

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Section: Resultsmentioning

confidence: 99%

Structural And Optical Properties Of VOx Thin Films

Schneider

2015

Archives of Metallurgy and Materials

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“…The dependence of optical absorption coefficient with the photon energy helps to study the band structure and the type of transition of electrons . According to Tauc relation, the absorption coefficient α of a material is given by .…”

Section: Resultsmentioning

confidence: 99%

Effect of cesium chloride addition on crystal growth, structural, thermal and optical properties of γ‐glycine single crystal

Yogambal

Vizhi

Babu

2014

Crystal Research and Technology

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Single crystals of γ‐glycine in the presence of cesium chloride were grown from aqueous solution by low temperature solution growth technique. The phase purity and crystal structure of the grown crystals were confirmed by Powder X‐ray diffraction analysis. The presence of functional groups were confirmed by FT‐IR spectrum. Thermal analysis of the grown crystal was determined by thermogravimetric and differential thermal analysis (TG/DTA), which results the thermal stability of the grown crystal. The optical absorption and lower cut‐off values were ascertained by recorded UV‐Visible spectrum of γ‐glycine crystals. The existence of second harmonic generation efficiency of frequency doubling was found to be 6 times greater than that of KDP.

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“…Further optical transmission studies have been carried out to evaluate the optical parameters (K, α, R) and the optical band gap (E g ) [25]. As a consequence of a wide band gap (5.16 eV), this Mannich base crystal has a large transmittance in the visible region making it suitable for non-linear optical (NLO) applications such as fabrication of various photonic devices.…”

Section: Structural Characterization Of Mannich Basementioning

confidence: 99%

Synthesis, Characterization and Biological Studies on Cobalt(II) and Nickel(II) Complexes with Mannich Base 2-(Pyrrolidin-1-ylmethyl)isoindoline-1,3-dione

Suvaikin¹,

Kalaivanan²

2019

Asian J. Chem.

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A new Mannich base 2-(pyrrolidin-1-ylmethyl)isoindoline-1,3-dione was synthesized by the condensation of phthalimide, formaldehyde and pyrrolidine and was characterized on the basis of elemental analysis and IR, UV-visible, 1 H and 13 C NMR data. Cobalt(II) and nickel(II) complexes of new Mannich base were synthesized and characterized by elemental analysis, electrical conductance, electronic and IR spectra, magnetic measurements, thermal analysis and cyclic voltammetric studies. From IR data, it is inferred that the ligand is neutral bidentate bonding through pyrrolidine ring containing nitrogen and one of the two carbonyl oxygens. The magnetic moment values and electronic spectral data show that all the complexes studied are tetrahedral except Co(II) chloro complex. The electrochemical studies show that Co(II)/Co(I) redox couple exists during electrolysis. Thermal results indicate that Co(II) sulphato and Ni(II) chloro complexes undergo two stage decompositions to produce CoSO4 and NiO, respectively as final residues and that the ligand forms a polymer of formaldehyde as an intermediate. The antimicrobial activity measured by the agar well diffusion method showed that the metal complexes are more active than the ligand probably because of the chelation effect.

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Investigation of optical band gap in pyrrolidinomethylphthalimide crystal

Cited by 20 publications

References 20 publications

Structural And Optical Properties Of VOx Thin Films

Structural And Optical Properties Of VOx Thin Films

Effect of cesium chloride addition on crystal growth, structural, thermal and optical properties of γ‐glycine single crystal

Synthesis, Characterization and Biological Studies on Cobalt(II) and Nickel(II) Complexes with Mannich Base 2-(Pyrrolidin-1-ylmethyl)isoindoline-1,3-dione

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