Page 28 - CFM_Newsletter_CY22

Mr. T. Viswanathan (16PHD0268), Research Scholar, VIT, Vellore, June 3 .
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The development of new organometallic material with push-pull systems has been utilized in various
nonlinear optical applications such as electro-optic modulators, optical data storage devices,
telecommunications, optical switches and NLO bioimaging. The synthesis and structural properties of
borasiloxanes were well established. Nevertheless, not much consideration has been compensated toward
the photophysical properties, and varying substituents on the boron atom can tune the absorption and
emission properties of borasiloxanes. The three-coordinated boron is isoelectronic and isostructural with a
positively charged carbocation, and the pz orbital of the boron atom acts as an effective π-electron acceptor.

Ferrocene/Non-Ferrocene Conjugated Bora siloxanes for Luminescence and Nonlinear Optical studies

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Mr. S. Prabu (16PHD0276), Research Scholar, VIT, Vellore, June 24 .
The discussion was about the development of new organometallic material with push-pull systems. It has
been utilized in various nonlinear optical applications. The synthesis and structural properties of
borasiloxanes were well established. Tri- and tetracoordinated boron complexes have found applications
in various fields. The talk discussed the bulk second-order nonlinear optical properties (χ2) of chromophores
carried out by Kurtz and Perry powder method and also, the first hyperpolarizabilities (β) were measured
using the Hyper Rayleigh scattering (HRS) technique.

Double Perovskite Material for Magnetocaloric effect Application

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Mr. P. Sathishkumar (17PHD0253), Research Scholar, VIT, Vellore, July 29 .
Double perovskites was the topic of discussion as it is becoming an important research topic due to its
intriguing magnetic properties coupled with electric fields. As the focus on discovering new energy materials
which as renewable in nature has taken speed, rare earth manganites possess most of the qualities to
become a new energy material for cooling purposes. The magnetocaloric effect exhibited by these materials
finds application in many energy devices such as refrigerators, cooler etc. The double perovskite structure
of rare earth manganites helps in attaining the goal of becoming a successful magnetic refrigerant. In this
work, R2 NiMnO6 (R2=La,Gd) was synthesized using the solid-state reaction method.
Formation of Air Stable Fe88 Co12 Alloy Nanoparticle Prepared by High Energy Ball Milling

Ms. P. Saraswathi (18PHD0278), Research Scholar, VIT, Vellore, August 12 .
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The mechanical alloying procedure which has been a major focus in recent years to manufacture
nanostructured materials was given importance during the talk by the speaker. Fe88 Co12 alloys are useful
in a variety of fields, including magnetic storage and composite permanent magnets. Because of their
unique magnetic properties, such as high permeability and higher saturation magnetization per volume than
any other material, Fe88 CO12 alloys are an important soft magnetic material. The goal of this investigation

is to use a high-energy alloying process in the air to study the effect of making a nanocrystalline Fe88 Co12
alloy presenting the evolution of microstructure and magnetic properties over different milling times
(0,3,6,12 and 24 h) without using special equipment for sample storage or handling.

Ferrocene appended D- π- A Chromophores: Structure, Electrochemical, Photophysical and AIE studies
Ms. V. S. Subiksha (19PHD0341), Research Scholar, VIT, Vellore, August 26 .
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The D- π-A based organometallic materials have been developed due to its broad application in the field of
Non-linear optics. In that pathway, Ferrocene attached 1,3-indanedione push-pull chromophoreshaves
been synthesized and characterized with various analytical and spectroscopic techniques. The single
crystal X-Ray diffraction study was used to confirm the structure of the chromophores. The photophysical

CFM Newsletter Jan. – Dec. 2022 28 Vol – 2