Semiorganics: A New Class of Nlo Materials

Newman, P. R.; Warren, Leslie F.; Cunningham, Peggy; Chang, Tallis Y.; Cooper, Donald E.; Burdge, Geoffrey L.; Polak‐Dingels, P.; Lowe-Ma, Charlotte K.

doi:10.1557/proc-173-557

Cited by 105 publications

(30 citation statements)

References 4 publications

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“…Changes in energy needed to flip protons are called chemical shifts. The location of chemical shifts (peaks) on a NMR spectrum are measured from a reference point that the hydrogen's in a standard reference compound -(CH 3 ) 4 Si or tetramethylsilane (TMS) -produce. The amount of energy necessary to flip protons in TMS is assigned the arbitrary value of zero δ.…”

Section: H Nmr Spectral Analysismentioning

confidence: 99%

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HUMO-LUMO Studies on Methyl Orange Doped ZTS Crystals for Laser Applications

Suresh¹,

Kumar²,

Ambalavanan³

et al. 2018

IJERMT

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Abstract:inc Thiourea Sulphate (ZTS), crystal is a magnificent metal natural compound, which consolidates the upsides of both natural and inorganic materials when contrasted and other customary non-linear optical materials and in this way can be utilized as a part of a more extensive scope of uses. Late endeavors at delivering new recurrence transformation materials have concentrated essentially on expanding the extent of the NLO properties that can recurrence twofold low pinnacle control sources, for example, diode lasers. The thermo gravimetric examination (TGA) and differential warm investigation (DTA) were completed utilizing Seiko warm analyzer at warming rate 20°C/min in air to decide the warm dependability of the compound. ZTS crystals were developed by moderate cooling procedure. This empowers the development of mass gems along all the three bearings at an ideal pH. FTIR examines demonstrate that in the spectra of ZTS there is a move in the recurrence band in the low-recurrence district which uncovers that thiourea shapes sulfur-to-zinc securities in the ZTS crystals. The stability and charge delocalization of the molecule were also studied by natural bond orbital (NBO) analysis. The HOMO-LUMO energies describe the charge transfer takes place within the molecule. Molecular electrostatic potential has been analyzed. The developments try in extensive scale with this enhanced pH qualities is required to yield mass crystal appropriate for laser combination tests and SHG device applications.

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Section: H Nmr Spectral Analysismentioning

confidence: 99%

“…have been proposed. The first theory of crystal growth was proposed as early as the late 19 th century [4]. The development of the theories of crystal growth has thrown more light on the understanding of crystal growth phenomena.…”

Section: Introductionmentioning

confidence: 99%

HUMO-LUMO Studies on Methyl Orange Doped ZTS Crystals for Laser Applications

Suresh¹,

Kumar²,

Ambalavanan³

et al. 2018

IJERMT

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“…To overcome the limitation of these materials, interests have been focused on semi-organic crystals. In which it leads to explore the combined properties of both inorganic and inorganic crystals like high damage threshold, wide transparency range, less deliquescence, higher mechanical strength and thermal stabilities are obtained for device fabrication [4,5]. Recently effort has been made on metal complexes of thiourea and analogues.…”

Section: Introduction:-mentioning

confidence: 99%

Single Crystal Growth and Characterization of Zinc Doped Magnesium Thiourea Acetate Crystals.

Rajendran¹,

Subramaniam²

2017

IJAR

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A semi organic nonlinear optical single crystals of zinc magnesium thiourea acetate (ZMTA) were grown from slow evaporation technique at room temperature. The unit cell parameters were determined from single crystal X-ray diffraction studies. FTIR studies were performed to identify the functional groups present in the compound. The UV-Vis spectrum indicates the grown crystal has good transparency in the entire UV-Vis region spectrum suggesting the suitability of the material for NLO applications. The thermal studies show that the crystal is thermally stable up to120C. The relative second harmonic efficiency of the compound is found to be 1.64 times greater than that of KDP. …………………………………………………………………………………………………….... Introduction:-In recent development of research in nonlinear optical phenomena are involved in scientific and industrial applications. The property of second harmonic generation are focused in electro optic modulation, optical switching and also it involves in the domain of optoelectronic and photonics. Especially organic and inorganic materials are given increasing attention due to its rapid technological advances in various fields, such as laser technology, fibre optics, telecommunication, optical computing and optical data storage technology [1][2][3]. To overcome the limitation of these materials, interests have been focused on semi-organic crystals. In which it leads to explore the combined properties of both inorganic and inorganic crystals like high damage threshold, wide transparency range, less deliquescence, higher mechanical strength and thermal stabilities are obtained for device fabrication [4,5]. Recently effort has been made on metal complexes of thiourea and analogues. Inorganic matrix of thiourea molecules are an interesting material plays important role due to their large dipole moment and ability to form an extensive network of hydrogen bonds with metals [6,7]. The NLO properties of some complexes of thiourea, such as bis (thiourea) cadmium sulphate (CTS) [8], potassium thiourea bromide (PTB) [9] and zinc thiourea sulphate (ZTS) have been reported elsewhere [10]. In the present investigation, the effect of Zinc doped MTA crystals have been studied using single crystal XRD, FT-IR, UV-Vis, thermal and microhardness of the grown crystals have been carried out. The NLO property of as grown crystal has been confirmed by Kurtz powder technique. Synthesis and crystal growth:-Single crystal of zinc doped MTA material was synthesized using AR grade of Thiourea, Magnesium acetate and Zinc acetate. Double distilled water was used as a solvent. Calculated amount of (3: 0.9: 0.1) the above materials were dissolved in 100 ml of water and stirred well using magnetic stirrer. Well defined single crystals of good transparency were harvested after a period of 15 days and shown in Fig.1.

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“…Inorganic materials possess excellent mechanical and chemical properties but most of them show low nonlinear efficiency. The need for materials which combine large nonlinear optical characteristics with resistance to physical and chemical attack has led to the investigation of semi-organics [5][6][7][8]. Semi-organic materials have the potential for combining high optical nonlinearity and chemical flexibility of organics with the physical ruggedness of inorganic.…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of semiorganic nonlinear optical tetrakis thiourea nickel chloride single crystals

Bhaskaran

Ragavan

Sankar

et al. 2007

Cryst. Res. Technol.

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A new nonlinear optical material tetrakis thiourea nickel chloride (TTNC) was synthesized and single crystals were grown from mixed solvent of water and isopropanol by both slow evaporation and slow cooling methods. The grown crystals were characterized by powder X-ray diffraction analyses to confirm the crystal structure. The presence of functional groups and the coordination of metal ions to thiourea were confirmed by FTIR and Raman spectroscopy analyses. UV-VIS spectrum was recorded to study the optical transparency of the grown crystals. Thermal properties of the crystals have been by investigated using thermo gravimetric (TG) and differential thermal analyses (DTA), which indicate that the material does not decompose before melting. The second order nonlinear optical property of the grown crystal was examined by Kurtz powder technique and mechanical behavior was studied by Vicker's microhardness test.

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Semiorganics: A New Class of Nlo Materials

Cited by 105 publications

References 4 publications

HUMO-LUMO Studies on Methyl Orange Doped ZTS Crystals for Laser Applications

HUMO-LUMO Studies on Methyl Orange Doped ZTS Crystals for Laser Applications

Single Crystal Growth and Characterization of Zinc Doped Magnesium Thiourea Acetate Crystals.

Growth and characterization of semiorganic nonlinear optical tetrakis thiourea nickel chloride single crystals

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