Professor (Mrs) S. R. Hettiarachchi

Professor in Chemistry

B.Sc (Ruhuna); Ph.D (Maine); M.I.Chem.C; Chartered Chemist (MRC)

Chemistry
Faculty of Natural Sciences
RG GS
Professor in Chemistry
Contact:

The Open University of Sri Lanka, Regional Centre-Matara , MRC

Office: +94-412222943, Ext: Mobile: +94-712517951 Fax: +94412222943

E-mail: srhet@ou.ac.lk

Working as a  Professor in Chemistry, Department of Chemistry, The Open University of Sri Lanka, Matara Regional Centre since 25.09.2003 and holding following responsibilities.

  1. Senior coordinator for CMU3233/CYU5633/CYU5313 Polymer Chemistry
  2. Conducting most of the Inorganic, Organic and Physical Chemistry day schools and all chemistry practical classes from level 3 to level 5 undergraduates at the Matara Regional Centre
  3. Student counsellor of Matara regional centre, Faculty of Natural Sciences

Last Updated on 2 years

Areas of Specialization:

Inorganic Chemistry

Research interests:
  • Environmental Chemistry
  • Natural product chemistry
  • Photochemistry
Programme Coordination:

B.Sc Degree Programme

Course Coordination:

CYU5633/CYU5313 Polymer Chemistry

Awards:

Research Position 2011 – University of Canberra, Australia

Endeavour Research Fellowship Award 2012 – University of Canberra, Australia

OUSL Research Award – Open University of Sri Lanka

Researches:

RESEARCH PUBLICATIONS (Full Papers)

A.A. Wijeweera , J.W. Hewage , G.G. Jayasinghe , S. H. Wadumethrige , S.R. Hettiarachchi and K.G.G. Wijesinghe. Maturity dependence of quality, quantity and chemical constituents of bark and leaf oil of Ceylon Cinnamon (Cinnamomum zeylanicum Blume), Ruhuna Journal of Science, 2020, Vol 11 (1): 1-12.

M.N.K. de Zoysa, S.R. Hettiarachchi, S.P. Karunanayaka & S. Naidu Orchestrating knowledge construction in peer-facilitated online discussion forums, The Ninth Pan-Commonwealth Forum (PCF9) on Open Learning, International conferences on open, distance and technology-enabled learning, held in Edinburgh, Scotland on 9-12 September, 2019, http://oasis.col.org/bitstream/handle/11599/3247/PCF9_Papers_paper_241.pdf?sequence=1&isAllowed=y

Samanthika R. Hettiarachchi, William A.Maher, Frack Krikowa and Rod Ubrihien,Factors influencing arsenic concentrations and species in mangrove surface sediments from south-east NSW, Australia Environ Geochem Health, 2016, 39(1), 1-11

Samanthika R.Hettiarachchi and Darshani Weeraheawa, Effect of Na2SiO3 on heavy metal uptake by field grown Basella alba L. in Matara, Sri Lanka,Ruhuna Journal of Science, 2016, 7(2), 21-31.

Samanthika R Hettiarachchi and Chamani P M Marasinghe Wadige, Arsenic uptake and speciation in Oriza sativa L. grown in Wahalkada, Sri Lanka, IRJNAS, 2016, 03(10), 197-211

Samanthika R Hettiarachchi and Chamani P M Marasinghe Wadige, Investigation of selenium levels in some consumable food in Sri LankaInt. j. res. methodol. phys. chem. 2014, 01(05), 9-13

Samanthika R. Hettiarachchi, Some investigations based on photochemistry, natural product chemistry and environmental chemistry Editorial Article,Review and Research: Journal of chemistry. 2015, 4(1)

Samanthika R.  Hettiarachchi ; Brian K. Schaefer; Renante L Yson; Richard J Staples; Regine Herbst-Irmer; Howard H Patterson,Observation of a mixed-metal transition in heterobimetallic Au/Ag dicyanide systemsInorg. Chem. 2007, 46(17), 6997-7004.

Ravi L. Arvapally, Pankaj Sinha, Samanthika R. Hettiarachchi, Nathan L. Coker,  Howard H. Patterson, R. C. Elder, Angel K. Wilson and Mohammad A. Omary,Photophysics of  Bis (thiocyanato) gold (I) complexes: Itriguing Structure-   Luminescence Relationships,J. Phys. Chem. C 2007, 111, 10689-10699

Samanthika R. Hettiarachchi, Howard H. Patterson and Mohammad A. Omaray, “Write/Read/Erase” with Laser Irradiation of Dicyanoargentate(I) Doped and Pure  Crystals, J.  Phys. Chem. B 2003, 107, 14249-14254

Samanthika R. Hettiarachchi, Manal A. Rawashdeh Omaray, Soffian M. Kanan, Mohammad A. Omaray, Howard H. Patterson and Carl P. Tripp, Spectroscopic studies on “Exciplex Tuning” for Dicyanoaurate(I) Ions Doped    Potassium Chloride CrystalsJ. Phys. Chem. B 2002, 106, 10058-10064.

 

CONFERENCE PRESENTATIONS & ABSTRACTS

Wijeweera A. A., Hettiarachchi S. R.,* Hewage J. W., Wadumethrige S. H., Jayasinghe G. G. Differences of chemical constituets in three physiological stages of Ceylon Cinnamon, (Cinnamomum zeylanicum Blume, Proceedings of the Open University Research Session (OURS 2021), The Open University of Sri Lanka. Sept 16-17, 2021 page 22.

Wijeweera, A. A, Hewage, J. W, Wadumethrige, S.H, Hettiarachchi, S. R and Jayasinghe G.G, Position variation of oils extracted from the stem of Ceylon Cinnamon, (Cinnamomum zeylanicum Blume): Qualitative and Quantitative comparision, Proceedings of 8th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. February 17, 2021 page 14.

Wijeweera, A. A, Madhushika, K.T.S, Wadumethrige, S.H, Hewage, J.W, Hettiarachchi, S. R and Jayasinghe G.G, Agroecological dependence of the quantity of phytochemicals in barks of Ceylon Cinnamon, (Cinnamomum zeylanicum Blume), Proceedings of 8th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. February 17, 2021 page 16.

Wijeweera, A. A, Hewage, J. W, Wadumethrige, S.H, Hettiarachchi, S. R and Jayasinghe G.G, Effect of agro-ecological variation on growth and cinnamon oil yield of Ceylon Cinnamon, (Cinnamomum zeylanicum Blume), Proceedings of 8th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. February 17, 2021 page 22.

Hettiarachchi, S. R., Samaraweera, C.M.D., Edirisinghe, E.A & Brinili, A.D, Investigation of the effect of heavy metals and other physico-chemical parameters for the coloration in water of Kattakaduwa reservoir, Proceedings of 7th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. January 22, 2020, page 93.

Wijeweera, A. A, Hewage, J. W, Jayasinghe, G. G , Hemalika,W. S, Hettiarachchi, S. R and Wijesinghe, K. G. G Maturity Dependence of Quality, Quantity and Chemical Constituents of Bark and Leaf Oil of two varieties of Ceylon Cinnamon (Cinnamomum zeylanicum Blume), Proceedings of 7th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. January 22, 2020, Page 17.

Madhushuka, K. T, Wijeweera, A. A, Hemalika, W. S, Hettiarachchi, S.R., Hewage, J. W, Jayasinghe, G. G and Wijesinghe, K. G. G
Maturity and variety dependence of bioactive constituents of ceylon cinnamon (Cinnamomum zeylanicum Blume)

Proceedings of 7th Ruhuna International Science & Technology Conference, University of Ruhuna, Matara, Sri Lanka. January 22, 2020, Page 100.

J.W.Hewage, W.S. Hemalika, S.R.Hettiarachchi, G.G.Jayasinghe, K.G.G. Wijesinghe, Study of variation in chemical compositions of Sri Lankan true cinnamon on geographical and ecological varience and identification of bioactive components, Proceedings of international symposium on agriculture and environment 2018, spice session, 17th January 2018, page 07.

I.A. Premaratne, T. C. Sandanayake, Samanthika R. Hettiarachchi,S. A. S. Kaushalya, Shironika P. Karunanayake, Som Naidu, Reflections on the design and development of Senareo-based videos in MOOCs. Proceedings of Open University International Research Sessions (i-OURS-2018).

Samanthika R Hettiarachchi and Chamani P M Marasinghe Wadige Arsenic speciation studies in Oriza sativa L. grown in Wahalkada, Sri Lanka, European Chemistry Congress, June 16-18, 2016 Rome, Italy Scientific Tracks Abstracts: Chem. Sci J Chem Sci J 2016, 7:2(suppl), http://dx.dol.org/10,4172/2150-3494,C1,002 https://www.youtube.com/watch?v=FWjpgnc1UKY

Samanthika R Hettiarachchi and Chamani P M Marasinghe Wadige, Preliminary investigation on selenium levels of some consumable food in Sri Lanka, Second Ruhuna International Science and Technology Conference (RISTCON, January 22-23, 2015, University of Ruhuna, Matara, Sri Lanka.

A.A.S.P. Athukorala and Samanthika R.Hettiarachchi, Extraction, separation and identification of compounds in Cyanodon dactylon, 6th Science Symposium, December 23, 2009, University of Ruhuna, Marata, Sri Lanka.

Scheafer, B., Patterson, H.H., Hettiarachchi, S.R,Solvent supported d (10) interactions in KauxAg1-x (CN) 2.Y H2O crystals, Proceedings of American Chemical Society—230th National meeting. August 28-September 01, 2005, Washington DC, USA, Volume 230, pp. U2082-U2082.

Howard H. Patterson,; Mohammad A. Omary.; Lulie C. F. Colis.; Samanthika R. Hettiarachchi, Tunable luminescence and optical memory in nanoclusters of Ag(CN)2- and Au(CN)2- doped in alkali halide matrices, American Chemical Society- 227th  National Meeting, March 28-April 1, 2004, Anaheim, California, USA, Volume 227, pp U1558-U1558

Howard H. Patterson; Samanthika R. Hettiarachchi.; Julie C. F. Colis.; Mohammad A. Omary, Write/Read/Erase” with laser irradiation of dicyanoargentate(I) doped and pure crystals, American Chemical Society- 226th  National Meeting, September, 2003, New York, NY, USA, Volume 226, U771-U771

Ravi K. Arvapally.; Nigel l. Coker.; Samanthika R. Hettiarachchi.; Richard C. Elder.; Howard H. Patterson,; Mohammad A. Omary,Temperature-dependent and Time-resolved Luminescence Studies of Bis(thiocyanato)gold(I) Complexes, American Chemical Society- 225th National Meeting, March 23-27, 2003, Orleans, Louisiana, USA, Volume 225 U98-U98.

Samanthika R. Hettiarachchi and Howard H. Patterson, Optical Memory Studies of Dicyanoargentate(I) and Dicyanoaurate(I) Ions Doped in Alkali Halide Crystals, American Chemical Society- 224th National Meeting, August 18-22, 2002, Bostan. MA, USA, Volume 225 U688-U688.

Samanthika R. Hettiarachchi, Julie C. Colis, Soffian M. Kanan, Howard H. Patterson and Carl P. Tripp, Luminescence and Raman Studies of Exciplex Tuning in Pure and Potassium Chloride Doped  Crystals of the Dicyanoargentates (I), 30th ACS Northeast Regional Meeting, University of New Hampshire,   Durham, NH, USA, 2001.

Julie C. Colis, Samanthika R. Hettiarachchi, Soffian M. Kanan and Howard H. Patterson,Optical Memory of Ag(CN)2- Doped in Sodium Chloride Crystals, 30th ACS Northeast Regional Meeting, University of New Hampshire, Durham, NH, USA, 2001.

Ongoing Research:

Investigation of the Effect of Geographical and Ecological Variation on the Quality and Quantity of Chemical Constituents of Ceylon Cinnamon (Cinnamomum zeylanicum Blume.)

Research Supervisions:

M.Phil. Student

A. A. Wijeweera (2017) “Investigation of the Effect of Geographical and Ecological Variation on the Quality and Quantity of Chemical Constituents of Ceylon Cinnamon (Cinnamomum zeylanicum Blume.)”

B.Sc. Students

C.M.D Samaraweera – 2017. “Seasonal variation of heavy metals and other physicochemical parameters in Kattakaduwa Reserviour ”.

D.S.W Wickramasnghe – 2015. “Effect of sodium silicate mediated alleviation on heavy metal uptake of field grown Basilla alba in Matara, Sri Lanka”.

N.N.P Thusitha Kumara – 2013. “Preliminary investigation of selenium levels in different species of fish and meat in Matara area”.

Publications:

BOOKS PUBLISHED

Shironica P. Karunanayaka and Som Naidu, I. A. Premaratne and K. G. S. K. Perera, M. N. K. de Zoysa and S. R. Hettiarachchi , S. A. S. Kaushalya Perera, S. A. Ariadurai and J. C. N. Rajendra, T. C.  Sandanayake and D. D. M. Ranasinghe “Pathways to Open Educational Practices”, Published by  The Open University of Sri Lanka, Nawala, Nugegoda, Sri Lanka (ISBN 978-955-23-1763-7)

Dr. S. R. Hettiarachchi “Qualitative and Quantitative Analysis” A Guide for Practical Chemistry, S Godage publishers (ISBN : 978-955-30-6346-S)

BOOK AUTHOR – OPEN UNIVERSITY OF SRI LANKA

Dr. S. R. Hettiarachchi and Mrs. R.U. Tantriigoda (2007). Basic Principles of Chemistry (CMU1200) Unit 1 (Atomic structure and the Periodic TableThe Open University of Sri Lanka, ISBN 978-955-23-1148-2

Dr. S. R. Hettiarachchi (2007). Chemistry II (CMF2206) Unit 3 (Behaviour of GasesThe Open University of Sri Lanka, ISBN 978-955-23-1400-1

Dr. S. R. Hettiarachchi andProf. R.U. Tantriigoda (2017) Basic Principles of Chemistry I (CYU3300) Unit 1(Models of atomic structure and modern periodic tableThe Open University of Sri Lanka, ISBN 978-955-23-1636-4

BOOK EDITOR – OPEN UNIVERSITY OF SRI LANKA

Dr. S. R. Hettiarachchi andProf. R.U. Tantriigoda (2017) Basic Principles of Chemistry I (CYU3300) Unit 1(Models of atomic structure and modern periodic tableThe Open University of Sri Lanka, ISBN 978-955-23-1636-4

Prof. K.W.S. Kularatne (2007) Polymer Chemistry (CMU 3233) Unit V (Kinetics of Polymerization), sessions 1-5The Open University of Sri Lanka, ISBN 978-955-23-1290-8

Dr. K. G. Padmasiri (2007) Industrial Chemistry (CMU 3232) Unit VII (Miscellaneous ChemicalIndustries), sessions 1-5The Open University of Sri Lanka, ISBN 978-955-23-1148-2

Mrs. J. Saparamadu (2017) Practical chemistry I (CYU3202),The Open University of Sri Lanka, ISBN 978-955-23-1148-2

 

 

 

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