Dr. D. Sajan

Research Experience

Ph.D work entitled “Vibrational Spectral Investigations and ab initio Computations of Certain Biologically Important Molecules and Organic Non Linear Optical Materials ”
M. Phil. Dissertation entitled
Research Guide of the University of Kerala - supervision of Seven Ph. D works under progress.

Research Interests

Nonlinear optical materials
Vertical Bridgman Method (Organic Crystal growth)
Low Temperature Solution Growth (Organic and semi organic Crystals growth)
Molecular vibrational spectral studies of biomolecules of importance and organic NLO materials using NIR-FT Raman, SERS and IR Spectra
Quantum chemical computations using ab initio and Density Functional Theoretical methods for geometry Optimization and vibrational spectral prediction of Biomolecules for analysis of experimental results
Growth of new NLO crystals for structural and vibrational characterization
Vibrational spectral studies of natural product molecules with medicinal properties

Teaching Experience

Working as Assistant Professor in the Research (proposed) and Post Graduate (DST‐ FIST sponsored) Department of Physics, Bishop Moore College, Mavelikara, Kerala,India, since 2nd June 2009.
Worked as HSST Physics at V.P.S.H.S.S For Boys Venganoor, Thiruvananthapuram from 28-08-1998 to 01-06-2009.

Trainings Attended

“ Special Summer School in Quantum Mechanics”
held from 03-04-2013 to 22-04-2013, UGC-Academic Staff College, Kannur University

“Refresher Course in Experimental Physics”
held from 04-10-2012 to 24-10-2012, UGC-Academic Staff College, University of Hyderabad

“Refresher Course in Theoritical Physics”
held from 04-12-2009 to 16-12-2009, conducted by Indian Academy of Sciences, Bangalore

Research papers Published In Indexed/ Peer Reviewed Journals

2014
1 1.	Molecular conformational analysis, vibrational spectra and normal coordinate analysis of trans-1,2-bis(3,5-dimethoxy phenyl)-ethene based on density functional theory calculations. Lynnette Joseph, D. Sajan, K. Chaitanya, Jayakumary Isac Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Volume 122, 25 March 2014, Pages 375–386
2 2.	Molecular structure, NBO analysis, electronic absorption and vibrational spectral analysis of 2-Hydroxy-4-Methoxybenzophenone: Reassignment of fundamental modes Lynnette Joseph, D. Sajan, K. Chaitanya, T. Suthan, N.P. Rajesh, Jayakumary Isac Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 120, 24 February 2014, Pages 216-227
2013
3.	Three-photon absorption and vibrational spectroscopic study of 2-methylamino-5-chlorobenzophenone D.Sajan, K. Chaitanya, K. Safakath, Reji Philip, T. Suthan, N.P. Rajesh Spectrochim Acta.Part A .106 (2013) 253-261.
4.	Growth, electronic absorption and vibrational spectral analysis of semiorganic nonlinear optical material potassium acid phthalate: A scaled quantum mechanical force field study S. Alen, D. Sajan, N. Vijayan, K. Chaitanya, Ivan Němec, V. Bena Jothy Journal of Molecular Structure, 1040 ( 2013) 155-163.
5.	Ultrafast optical nonlinearity, electronic absorption, vibrational spectra and solvent effect studies of ninhydrin D. Sajan, T. Uma Devi, K. Safakath, Reji Philip, Ivan Němec, M. Karabacak Spectrochim Acta.Part A .109 (2013) 331-343.
6.	Multi-photon absorption effect and intra-molecular charge transfer of donor-π-acceptor chromophore ethyl p-amino benzoate D. Sajan, N. Vijayan, K. Safakath, Reji Philip, M. Karabacak Spectrochim Acta.Part A .108 (2013) 197-210.
7.	Structural conformations and density functional study on the intramolecular charge transfer based on vibrational spectra of 2,4-dihydroxy-N′-(4-methoxybenzylidene)benzohydrazide D.M. Suresh, D. Sajan, Yun-Peng Diao, Ivan Němec, I. Hubert Joe, V. Bena Jothy Spectrochim Acta.Part A .110 (2013) 157-168.
8.	Crystal growth, spectral, optical and thermal properties of semiorganic nonlinear optical material: Picolinic acid hydrochloride S. Gowri, T. Uma Devi, D. Sajan, C. Surendra Dilip, A. Chandramohan, N. Lawrence Spectrochim Acta.Part A .110 (2013) 28-35.
9.	Density functional theory study, FT-IR and FT-Raman spectra and SQM force field calculation for vibrational analysis of 1, 3-Bis (hydroxymethyl) benzimidazolin-2-one Lynnette Joseph, D. Sajan, K. Chaitanya, H.C. Devarajegowda, Jayakumary Isac Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 114, October 2013, Pages 432-440
10.	Synthesis, crystal growth, thermal studies and scaled quantum chemical studies of structural and vibrational spectra of the highly efficient organic NLO crystal: 1-(4-Aminophenyl)-3-(3,4-dimethoxyphenyl)-prop-2-en-1-one Lynnette Joseph,D. Sajan^,, Venkataraya Shettigar, K. Chaitanya, Neeraj Misra, Tom Sundius, I. Němec Materials Chemistry and Physics, Volume 141, Issue 1, 15 August 2013, Pages 248–262
2012
11.		Vibrational spectra, structural conformations, scaled quantum chemical calculations and NBO analysis of 3-acetyl-7-methoxycoumarin Lynnette Joseph, D. Sajan, R. Reshmy, B.S. Arun Sasi, Y. Erdogdu, K. Kurien Thomas Spectrochim Acta.Part A .99 (2012) 234-247.
12.		Spectral, thermal and optical properties of adenosinium picrate: A nonlinear optical single crystal S. Gowri, T. Uma Devi, D. Sajan, S.R. Bheeter, N. Lawrence Spectrochim Acta.Part A .89 (2012) 119-122.
13.		Vibrational spectral investigation and Natural Bond Orbital analysis of anti-rheumatoid drug Ethyl 4-nitrophenylacetate – DFT approach D.M. Suresh, M. Amalanathan, S. Sebastian, D. Sajan, I. Hubert Joe, V. Bena Jothy Spectrochim Acta.Part A .98 (2012) 413-422.
14.		Synthesis, growth, spectral and thermal properties of a new organic crystal: 2-Carboxypyridin-1-ium trichloroacetate S. Gowri, K. Anitha, A. Suresh, T. Uma Devi, S. Selvanayagam, D. Sajan, A. Chandramohan, N. Lawrence Spectrochim Acta.Part A .95 (2012) 73-79.
15.		A rapid and versatile method for solvothermal synthesis of Sb2O3 nanocrystals under mild conditions K. Kaviyarasu, D. Sajan, Prem Anand Devarajan Appl Nanosci DOI 10.1007/s13204-012-0156-y(2012)
16.		A facile hydrothermal route to synthesize novel PbI₂ nanorods K. Kaviyarasu, D. Sajan, M.S. Selvakumar, S. Augustine Thomas, D. Prem Anand Journal of Physics and Chemistry of Solids, 73, (2012)1396-1400
17.		Synthesis, growth and vibrational spectroscopic study of a novel coumarinoylthiazole R. Reshmy, D. Sajan, K. Kurien Thomas, A. Sulekha, K.N. Rajasekharan, S. Selvanayagam, Ö. Alver Spectrochim Acta.Part A .97 (2012) 1125-1132.
18.		Vibrational (FT-IR and FT-Raman) spectral investigations of 7-aminoflavone with density functional theoretical simulations Y. Erdogdu, Ö. Dereli, D. Sajan, L. Joseph, O. Unsalan & M. T. Gulluoglu Molecular Simulation 38 (2012) 315-325.
19.		Synthesis, growth and characterization of 2-carboxypyridinium hydrogen (2R,3R)-tartrate monohydrate: A new organic nonlinear optical crystal S. Gowri, T. Uma Devi, D. Sajan, A. Chandramohan, N. Lawrence Optik - International Journal for Light and Electron Optics, (2012)
2011
20.		Intramolecular charge transfer and Z-scan studies of a semi organic nonlinear optical material sodium acid phthalate hemihydrate: A vibrational spectroscopic study D. Sajan, N.Vijayan, K.Safakath, R.Philip, I.Hubert.Joe Journal of Physical Chemistry A 115 (2011) 8216-8226.
21.		Natural bond orbital analysis, electronic structure, non-linear properties and vibrational spectral analysis of l-histidinium bromide monohydrate: A density functional theory D. Sajan, Lynnette Joseph, N. Vijayan, M. Karabacak Spectrochim Acta.Part A .81 (2011) 85-98.
22.		Electronic absorption, vibrational spectra and nonlinear optical properties of N-(2 chlorophenyl)-1-propanamide D. Sajan, N. Vijayan, Solid State Sciences 13 (2011) 175-184.
23.		Intramolecular charge delocalization and nonlinear optical properties of push–pull chromophore 1-(4-N,N-dimethylaminopyridinium) acetic acid bromide monohydrate from vibrational spectra D. Sajan, K. Udaya Lakshmi, I. Hubert Joe Spectrochimica Acta Part A 78 (2011) 264–272.
24.		Molecular structure and vibrational spectra of 2,6-bis(benzylidene)cyclohexanone: A density functional theoretical study D. Sajan, K. Udaya Lakshmi, Y. Erdogdu, I. Hubert Joe Spectrochimica Acta Part A 78 (2011) 113–123.
25.		Surface-enhanced Raman scattering and DFT theoretical studies on the adsorption behavior of plumbagin on silver nanoparticles Sajan, D., Kuruvilla, T., Laladhas, K.P.,Joe, I.H. Indian Journal of Physics 85 (2011) 477-484
26.		Growth and characterization of organic material 2-hydroxypyridine single crystal by modified vertical Bridgman technique T.Suthan, N.P. Rajesh, C.K.Mahadevan, D. Sajan, G. Bhagavannarayana Materials Chemistry and Physics 130 (2011) 915-920
27.		Spectral, thermal and optical properties of l-tryptophanium picrate: A nonlinear optical single crystal S.Gowri, T. Uma Devi, D. Sajan, S.R.Bheeter, N. Lawrence Spectrochimica Acta Part A 81 (2011) 257-260.
28.		DFT-based molecular modeling, NBO analysis and vibrational spectroscopic study of 3-(bromoacetyl)coumarin D.Sajan, Y.Erdogdu, R. Reshmy, Ö. Dereli, K.Kurien Thomas, Hubert Joe Spectrochimica Acta Part A 78 (2011) 113–123.
2010
29.		Vibrational contributions to the second-order nonlinear optical properties of π-conjugated structure acetoacetanilide, C. Ravikumar, I. Hubert Joe, D. Sajan Chemical Physics, 369, (2010) 1-7.
30.		Vibrational spectra and first-order molecular hyperpolarizabilities of p-hydroxybenzaldehyde dimer D. Sajan, Y. Erdogdu, Thomas Kuruvilla, I. Hubert Joe Journal of Molecular Structure, 983, (2010,) 12-21.
31.		Density functional study on the structural conformations and intramolecular charge transfer from the vibrational spectra of 1-(4-aminophenyl) 3-(3, 4-dimethoxyphenyl)-2-propen-1-one D.Sajan, Lynnette Joseph, I. Hubert Joe, AIP Conference Proceedings 1267(2010) 625-626
32.		Intramolecular charge transfer and hydrogen bonding interactions of nonlinear optical material N-benzoyl glycine: Vibrational spectral study D.Sajan, H.J. Ravindra, Neeraj Misra, I.Hubert Joe Vibrational Spectroscopy 54 (2010) 72-80
33.		Structural conformations and vibrational spectral study of chloroflavone with density functional theoretical simulations Y.Erdogdu, O.Unsalan, D. Sajan, M.T.Gulluoglu Spectrochimica Acta Part A 78 (2010) 113–123.
34.		NIR-FT Raman, FT-IR and surface-enhanced Raman scattering and DFT based theoretical studies on the adsorption behaviour of (S)-phenylsuccinic acid on silver nanoparticles Journal of Chemical Sciences 122 (2010) , pp. 511-519 D.Sajan, V.Bena Jothy, Thomas Kuruvilla, I.Hubert Joe
2009
35.		First order Molecular Hyperpolarizabilities and Intramolecular Charge Transfer from the Vibrational spectra of a Novel NLO Material: Ethyl-3-(3, 4-dihydroxyphenyl)-2-propenoate V. Bena Jothy, D. Sajan, C. Ravikumar, I. Němec, Chun-Nian Xia, V.S. Jayakumar and I. Hubert Joe, J. Raman Spectrosc. 40, (2009) 1822-1830.
36.		Density Functional Study on the Structural Conformations and Intramolecular Charge Transfer from the Vibrational Spectra of the Anti-Cancer Drug Combretastatin-A2 L. Padmaja, C. Ravikumar, D. Sajan, I. Hubert Joe, V.S. Jayakumar, G. R. Pettit and O. Faurskov Nielsen, J. Raman Spectrosc. 40,(2009) 419-428.
37.		Efficient π-electron conjugated push–pull nonlinear optical chromophore 1-(4-methoxyphenyl)-3-(3,4-dimethoxyphenyl)-2-propen-1-one: A vibrational spectral study Jose P. Abraham, D. Sajan, Venkataraya Shettigar, S.M. Dharmaprakash,I. Němec, I. Hubert Joe, V.S. Jayakumar, J. Mol. Struct. 917, (2009) 27-36.
2008
38.		Molecular Structure, Vibrational Spectra and First-order Molecular Hyperpolarizability of Potential anticancer drug, Combretastatin-A1 D. Sajan, Jose P. Abraham, I. Hubert Joe, V.S. Jayakumar, J. Aubard and O. Faurskov Nielsen J. Mol. Struct. 889, (2008)129-143.
39.		Surface enhanced Raman spectra of the organic nonlinear optic material: Methyl 3-(4-methoxy phenyl)prop-2-enoate D. Sajan, I. Hubert Joe, V.S. Jayakumar and Jacek Zaleski J. Chem. Sci., 120, (2008)1–6.
40.		Molecular structure, Spectroscopic studies and First-order molecular hyperpolarizabilities of p-amino acetanilide Jose P. Abraham, D. Sajan, I. Hubert Joe and V.S. Jayakumar Spectrochim. Acta Part A 71, (2008)355-367.
41.		Structural conformations and electronic interactions of the natural product, oroxylin: a vibrational spectroscopic study Jose P. Abraham, D. Sajan, Joseph Mathew, I. Hubert Joe, V. George, V. S. Jayakumar, J. Raman Spectrosc. 39, (2008)1821-1831 .
42.		NIR-FT Raman, FT-IR and surface-enhanced Raman scattering spectra, with theoretical simulations on chloramphenicol D. Sajan, G. D. Sockalingum, M. Manfait, I. Hubert Joe, V. S. Jayakumar J. Raman Spectrosc. 39, (2008)1772-1783.
2007
43.		Surface-enhanced Raman scattering of methyl p-hydroxy benzoate: A molecular orientational study D.Sajan, N.B.Prathima, C.M.Krishna, I.Huber Joe, V.S. Jayakumar Laser Physics 17 (2007) 1217-1221
2006
44.		Dimerisation and vibrational spectroscopic properties of (RS) – phenylsuccinic acid D. Sajan, A. Fischer, I.Hubert Joe, V.S.Jayakumar J. Raman Spectrosc. 37, (2006)1307-1318.
45.		Vibrational Spectra and Ab Initio Computations of Sarcosinium Oxalate Monohydrate V. Bena Jothy, T. Vijayakumar, D. Sajan, V. S. Jayakumar and I. Hubert Joe Laser Physics 16, (8) (2006) 1242-1252.
46.		Surface –enhanced Raman scattering and the adsorption behavior of (RS) – phenylsuccinic acid D. Sajan, Andreas Fischer, I. Hubert Joe, V. S.J ayakumar Spectrochim. Acta Part A 61, (2006)580-585.
47.		NIR-FT Raman, FT-IR and surface-enhanced Raman scattering of organic nonlinear optic material: p-hydroxy acetophenone D. Sajan, I.Hubert Joe, V.S.Jayakumar J. Raman Spectrosc. 37, (2006)508-519.
48.		Structural and electronic contributions to hyperpolarizability in methyl p-hydroxy benzoate D. Sajan, Hubert Joe, V.S. Jayakumar, Jacek Zaleski J. Mol. Struct. 785, (2006)43-53.
2005
49.		Vibrational spectra and density functional theoretical calculations on the antitumor drug, plumbagin D. Sajan, K. P. Laladhas, I. Hubert Joe and V. S. Jayakumar J. Raman Spectrosc. 36, (2005)1001-1011.
50.		Intramolecular charge delocalization and nonlinear optical properties of Methyl 3-(4-methoxy phenyl) prop-2-enoate from vibrational spectra D. Sajan, I.H.Joe, J.Zaleski and V.S.Jayakumar Laser Phys Lett. 2, (7) (2005) 343-350.
51.		Vibrational Spectral Studies of Methyl 3-(4-methoxy phenyl) prop-2-enoate, a new organic non-linear optic crystal D. Sajan, J. Benoy, I. Hubert Joe, V. S. Jayakumar and Jacek Zaleski J. Raman Spectrosc. 36, (2005) 221-236.
2004
52.		NIR – FT Raman and infra-red spectra and ab initio computations of glycinium oxalate D. Sajan, J.Binoy, B. Pradeep, K. Venkata Krishna, V.B.Kartha, I. Hubert Joe, and V. S. Jayakumar, Spectrochim. Acta part A 60, (2004)173-180.

Conference Presentations

DFT-based molecular modeling, NBO analysis and vibrational spectroscopic study of 3-(bromoacetyl)coumarin D. Sajan, Y. Erdogdu, I. Hubert JoeTurkish Physical Society 28th International Physics Conference will be held between, 6- 9 September 2011 at Bodrum-Turkey
FT-IR, NIR-FT-Raman studies and DFT quantum chemical calculations of anticancer drug Combretastatin- A1 D.Sajan, Jose P. Abraham, I.Hubert Joe, V.S.Jayakumar, J. Aubard, and O.Faurskov Nielsen Singapore International Chemistry Conference 5 (SICC-5) 2007
Molecular First-order hyperpolarizabilities of plumbagin from vibrational spectra D.Sajan, K.P.Laladhas, I.Hubert Joe and V.S. Jayakumar XXVIII European conference on Molecular Spectroscopy (EUCMOS) Istanbul, Turkey, 2006.
Surface enhanced Raman Scattering of (S)-Phenylsuccinic acid D.Sajan, Andreas Fischer, I. Hubert Joe and V.S.Jayakumar CSI XXXIV Colloquium Spectroscopicum Internationale ,University of Antwerp, Belgium 2005
Vibrational Spectra and Density functional calculation of Organic Nonlinear Optic Crystal p-Amino Acetanilide D.Sajan, I. Hubert Joe and V.S.Jayakumar International Conference on Materials for Advanced Technologies ,(ICMAT 2005), Singapore

Awards and Honors

DST -Young Scientist –Fast Track Project
Editorial Board Member of Spectroscopy: An International Journal from May 3, 2012 ( Hindawi Publishing Corporation)
Editorial Board Member of Journal of Theoretical Chemistry from January 22, 2013 ( Hindawi Publishing Corporation)

Referee for the following journals

Journal of Molecular Structure
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Spectroscopy Letters
Acta Crystographica B
Arabian Journal of Chemistry
Acta Crystallographica Section B: Structural Science , Crystal Engineering and Materials
Journal of Molecular Imaging and Dynamics

Professional Societies Memberships
-Senate Member, University of Kerala
-Member Indian Science Congress Association (ISCA)

Administrative Assignments
- NCC Officer

Personal Details

Date of Birth – 13-05-1973
Nationality – Indian
Languages Known – English, Hindi, Malayalam
Computer Skills - MS Word, MS Excel, MS Powerpoint etc

Dr. D. Sajan M.Sc., B.Ed, M.Phil., PhD.

Education