SYNOPSIS SUBMITTED IN PARTIAL FULFILMENT OF THE
DEGREE OF DOCTOR OF PHILOSOPHY IN PHYSICS
Submitted by
L. SUGI, M.Sc., B.Ed., M.Phil.,
Ref. No: 17391/Ph.D.K2/Physics/Full-time/July 2014/19.06.2014
Research Guide
Dr. S. DHEIVAMALAR, M.Sc., M.Phil., Ph.D., PGDCA.
Assistant Professor, Department of Physics
Government Arts College for Women (A)
Pudukkottai
Government Arts College for Women (Autonomous)
(Re-Accredited with B by NAAC)
Pudukkottai – 622 001
JUNE 2016
Introduction
Fullerenes are accepted as the fourth for of solid carbon after amorphous, graphite and diamond forms. Fullerene chemistry has provided a new dimension of aromatic and a new platform for discussion of mathematical techniques pertinent to large cages. They are basically, large carbon cage molecules. These fullerenes have attracted great interest a large number of physical and chemical properties. These properties of nanostructures strongly depend on this size, shape and chemical compositions. This property leads to very interesting and recent applications in medicinal chemistry, material science and nanotechnology. Functionalization, intercalation and doping by the addition of electron acceptors or donors are the way of modifying the properties of these nanostructures. Among these nanostructures carbon based nanomaterials such as nanotubes, nanocages, nanoshells,
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The electronic, vibrational properties have been used to understand the activity of the doped fullerene with metal to from the biochemical attraction with amino acids. It was found that binding of amino acids to doped fullerene generated a most stable complex through metal ion – nitrogen atoms. A DFT calculation shows that the functionalization of amino acid leads to the specific antibody interaction of
Wittig reactions allow the generation of an alkene from the reaction between an aldehyde/ketone and a ylide (derived from phosphonium salt).The mechanism for the synthesis of trans-9-(2-phenylethenyl) anthracene first requires the formation of the phosphonium salt by the addition of triphenylphosphine and alkyl halide. The phosphonium halide is produced through the nucleophilic substitution of 1° and 2° alkyl halides and triphenylphosphine (the nucleophile and weak base) 4 An example is benzyltriphenylphosphonium chloride which was used in this experiment. The second step in the formation of the of the Wittig reagent which is primarily called a ylide and derived from a phosphonium halide. In the formation of the ylide, the phosphonium ion in benzyltriphenylphosphonium chloride is deprotonated by the base, sodium hydroxide to produce the ylide as shown in equation 1. The positive charge on the phosphorus atom is a strong EWG (electron-withdrawing group), which will trigger the adjacent carbon as a weak acid 5 Very strong bases are required for deprotonation such as an alkyl lithium however in this experiment 50% sodium hydroxide was used as reiterated. Lastly, the reaction between ylide and aldehyde/ketone produces an alkene.3
11C or more commonly known as Carbon 11 is a radioisotope of Carbon (tracer) which gives off gamma rays. This radioisotope decays to Boron 11 due to beta plus decay or positron emission. Conversely this change can be a result of electron capture but the chance of this happening is minuscule (0.19-0.23% of the time). Carbon 11 has a half-life of 20.34 minutes [1]. The equation of the transformation between 11C and 11B is shown below:
The goal of this lab is to exemplify a standard method for making alkyne groups in two main steps: adding bromine to alkene groups, and followed by heating the product with a strong base to eliminate H and Br from C. Then, in order to purify the product obtained, recrystallization method is used with ethanol and water. Lastly, the melting point and IR spectrum are used to determine the purity of diphenylacetylene.
Experimental and Computation Vibration-Rotation Spectroscopy for Carbon Monoxide Through the Use of High-Resolution Infrared (IR) Spectra
People have often pondered the reasons for the greatness of Edith Wharton's novel, Ethan Frome. What is it that causes this story to be considered an all-time American classic? One journalist quotes a humanities professor at MIT who states that, "We turn to Wharton because the truths she tells are a bracing tonic in a culture steeped in saccharine sentimentality." The journalist goes on to describe the typical, "popular" story and how they often have endings where "romantic ideals are magically fulfilled..." There is much more to Ethan Frome than simply an unhappy ending to contrast with the many other stories that have sugar-coated and sanguine endings. At first glance, the ending of Ethan Frome may appear to be only depressing. In truth, Wharton offers the reader a complex ending through the careful incorporation of poetic justice and irony.
...Coauthor, ChemBioChem 2006, 7, 1-10; b) A. Author, B. Coauthor, Angew. Chem. 2006, 118, 1-5; Angew. Chem. Int. Ed. 2006, 45, 1-5.))
The charge transfer complex was studied from the reaction of iodine with mesitylene in pentane. From the relationship between concentration of iodine over its absorbance and concentration of mesitylene, the equilibrium constant was determined to be 0.4183, and the molar absorptivity to be 1.3780*104 M-1cm-1. Besides, the energy of photon needed to get excited was 369.52 kJ/mol, and the binding energy (W) of the excited state of charge transfer complex was 145.82 kJ/mol which was much larger than expected of only 9 kJ/mol for iodine and
The only compound of silicon and carbon is silicon carbide (SiC), or carborundum. SiC is produced naturally as the mineral Moissanite, but this is extremely rare, SiC is not known as Terrestrial mineral, since it is only found in meteors. But it is Synthesized from quartz sand and graphite in a Scale However, it has occurred mass in the form of powder For use as an abrasive since 1893. As an abrasive, it has been Used for more than one hundred years in molars and many Other abrasive applications.
Thickett, Geoffrey. Chemistry 2: HSC course. N/A ed. Vol. 1. Milton: John Wiley & Sons Australia, 2006. 94-108. 1 vols. Print.
be smuggled in by the Mafia, this happened to cost an arm and a leg
23. S. Alwarappan, S. Boyapalle, A. Kumar, C.-Z. Li and S. Mohapatra, J. Phys. Chem. C, 2012, 116, 6556–6559
Carbon Carbon is one of the basic elements of matter (Bush 1230-1231). The name carbon comes from the Latin word "carbo" meaning charcoal. Carbon is the sixth most abundant element (Gangson). More than 1,000,000 compounds are made from carbon (Carbon (C)). "The Element Carbon is defined as a naturally abundant non-metallic element that occurs in many inorganic and in all organic compounds, exists freely as graphite and diamond and as a constituent of coal, limestone, and petroleum, and is capable of chemical self-bonding to form an enormous number of chemically, biologically, and commercially important molecules.
Plontke, R. (2003, March 13). Chemnitz UT. TU Chemnitz: - Technische Universität Chemnitz. Retrieved April 1, 2014, from http://www.tu-chemnitz.de/en/
V. Amarnath, D. C. Anthony, K. Amarnath, W. M. Valentine, L. A. Wetterau, D. G. J. Org. Chem. 1991, 56, p. 6924-6931.
The development of quantum mechanics in the 1920's and 1930's has revolutionized our understanding of the chemical bond. It has allowed chemists to advance from the simple picture that covalent and ionic bonding affords to a more complex model based on molecular orbital theory.