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• Secretary, Board of Study in Science Education, Postgraduate Institute of Science, University of Peradeniya- 
Member, Institute of Chemistry, Ceylon
Member, Sri Lanka Association for the Advancement of Science
Best Postgraduate Research Award for the International Students, Tokyo Institute of Technology, Japan - 2003
President’s awards for scientific publications, National Research Council, Sri Lanka-2013
Fulbright Fellowship for Advanced Research and Lecturing, Fulbright Commission, U.S.A.-2012
Bhikaji Framji Khan Gold Medal for the academic excellence in B.Sc. (Hons.) Degree in Chemistry, University of Peradeniya-1994
Monbushou Scholarship awarded by the Ministry of Education, Sports and Culture, Japan -1997Cryst. Grow & Desg
Roshan K. Weerasekara, Hidehiro Uekusa and Champika V. Hettiarachchi, (2017). Multicolor photochromism of fulgide mixed crystals with enhanced fatigue resistance. Cryst. Grow & Desg, .
DOI: https://doi.org/10.1021/acs.cgd.6b01708
New J. of Chemistry
Naleen B. Jayaratna, Champika V. Hettiarachchi, Muhammed Yousufuddin and H. V. Rasika Dias, (2015). ·Isolable arene sandwiched copper(I) pyrazolates . New J. of Chemistry, 39: 5092-5095.
Acta Crystallographica B
C. V. Hettiarachch, R. K. Weerasekara and H. Uekusa (2015). Crystalline state photochromism of 3-furylfulgides: impact of size and bond flexibility of the non-aromatic alkylidene group. Acta Crystallographica B, 71: 535-554.
CrystEngComm
U.G. Randika Lakmali and Champika V. Hettiarachchi, (2015). Pseudo crystalline state thermochromic and reverse-photochromic reactivity of spiroindolinobenzopyran upon encapsulation into Zn-MOF-74. CrystEngComm, : 8607-8611.
Crystal Growth and Design
C. Vithana; H.Uekusa; A. Sekine; and Y. Ohashi, (2005). Modified Photoreactivity due to Mixed Crystal Formation III. Decelerated Photoisomerization upon Topochemically Unfavorable Conformational Change. Crystal Growth and Design, 5: 1755-1760.
European J. Organic Chemistry
A. Sharon; P.R. Maulik; C. Vithana; Y. Ohashi; V.J. Ram. (2004). Synthesis of biphenanthrenyls and role of C-H….X non-covalent interactions in conformational control. European J. Organic Chemistry, : 886-893.
Section B: Structural Science
C. Vithana; H. Uekusa; A. Sekine; Y. Ohashi. (2002). Acta Crystallographica. Section B: Structural Science, B58(6): 986-997.
Inorganica Chimica Acta
A. Paulovicova; U. El-Ayaan; K. Umezawa; C. Vithana; Y. Ohashi; Y. Fukuda. (2002). Inorganica Chimica Acta. Inorganica Chimica Acta, 339: 209-214.
Section B: Structural Science
C. Vithana; H. Uekusa; A. Sekine; Y. Ohashi. (2002). Acta Crystallographica. Section B: Structural Science, B58(2): 227-232.