Debdas Ray | Department of Chemistry

Profile

Debdas
Ray
Associate Professor
Department of Chemistry
School of Natural Sciences (SoNS)
R110
Block-Research Block, Shiv Nadar University
Dadri Uttar Pradesh
India
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Profile Summary 

Debdas Ray has received his PhD degree in 2008 from the Indian Institute of Technology Kanpur, India. His doctoral research was conducted under the supervision of Professor Parimal K. Bharadwaj, and focused on designing various supramolecular receptors for sensing and nonlinear optical studies. He then carried out first postdoctoral research in Professor Dario M. Bassani’s Group at University of Bordeaux1 (2009-2011), where he focused on the synthesis of fullerene (C60) and anthracene monolayers on silicon surfaces as well as various fullerene derivatives having hydrogen-bonding recognition unit for organic electronics. He did his second postdoctoral research with Professor Ivan Aprahamian (2011-2012) at Dartmouth College, USA, where he focused on hydrazine-based rotary switches for coordination-coupled proton relay mimicking proton translocation in biological systems. His third postdoctoral research was carried out in Professor Takashi Nakanishi’s group (2012-2013) at National Institute for Materials Science (NIMS), Japan, where he focused on neutral solvent-free liquid organometallic complexes of platinum(II) and iridium(III) for optoelectronic applications. He joined the Department of Chemistry at Shiv Nadar University as an Assistant Professor in July 2013. See full CV

Educational Qualifications 
2008
PhD
Indian Institute of Technology Kanpur
2002
MSc
Calcultta University
2002
BSc
Thakur Pukur Vivekananda College, Calcutta University
Work Experience 
20092011
Postdoctoral Research Fellow,
University of Bordeaux 1, France
20112012
Postdoctoral Research Fellow,
Dartmouth College, Hanover, New Hamshire, USA
20122013
Postdoctoral research Fellow,
National Institute for Materials Science (NIMS), Japan
Teaching & Research Interests: 

Teaching Interest

  •  Physical Methods in Chemistry
  •  Coordination and Bio-inorganic Chemistry
  •  Supramolecular Chemistry
  •  Principles of Fluorescence and applications
  •  Nuclear magnetic resonance spectroscopy
  •  Light-Camera-Action
  •  Physical organic Chemistry

Research Interest

Photo-functional Materials –Triplet Management

Research in the group focuses on using modular, and tunable organic donor-acceptor conjugates in the development of structurally simple adaptive photo-functional materialse.g., dual emitter (singlet/triplet harvesting), white-light emitter (singlet-triplet harvesting), thermo-phosphors (triplet harvesting), molecular switches, and responsive emitters. For this purpose we utilize synthetic organic and organometallic chemistry in conjunction with advanced spectroscopic methods and computational calculations.

Our interest in controlling non-radiative pathways above room-temperature and compensate its emission loss via structural change has driven us to the development of new donor-acceptor conjugates that can show thermally enhanced photoluminescence (TEPL) with increasing temperature (above RT). These novel systems are expected to form the basis of singlet and triplet harvesting that can be used in applications ranging from solar energy harvesting (solar cell via TEPL converter), high energy-efficient organic light-emitting diodes (OLEDs), security-imaging, sensors, sensitizers, photodynamic therapy to bio-imaging. In this regard, the group is also developing materials that can respond to circularly polarised light (CPL) for CPL-OLEDs.

Our group also focuses on amorphous organic materials that can show persistent photoluminescence. These materials have potential applications in security-imaging, invisible security ink, data encryption/decryption, anticounterfitting, night vission servaillance, sensors, bioimaging.   

Photoswitch

The group is also developing new allosteric switches based on coumarin-imidazole conjugate (i.e., conformational switches) that can be used in sensing, biological detection and among others.

Research Areas 
Conferences (Select): 

2018    ACS Publications Forum: Expanding Frontiers in Chemical Science, November 1, 2018, Banaras Hindu University (BHU), Varanasi.
2018    School of Physical Science, JNU, 12th September, 2018.
2017    Modulation of Emission Signaling Pathway through Allosteric control, TIFR Mumbai, July, 19-21, 2017.
2015    Fluorescence Spectroscopy and its Application, IIT Kanpur, November, 23-28, 2015.
2014  "A multistep switching cascade of hydrazone-based switches through coordination coupled proton relays"- Invited lecture in Calcutta University, April 7, 2014.
2014 National Seminar on Crystallography 43A, March 28-30, 2014, Indian Institute of Science Education and Research (IISER) Mohali.
2010 Supramolecular Control of Photo Reaction in Solid (Poster Presentation)-XXIIIrd IUPAC International  Symposium on Photochemistry, July 11-16, 2010, Ferrara, Italy.
2010    GDR “Electronic Organic” held in November 23-24, 2010, Bordeaux 1, France.
2007 Cation and Anion induced two-photon absorption in synthesized organic ligands (Lecture), Chemfest, Department of Chemistry, Indian Institute of Technology Kanpur, 2nd March, 2007.

Awards(Selected): 
20152018

Research grant of ~26 Lakhs (INR) from SERB-DST, India Govt.

20162020

Research grant of ~ 50 Lakha (INR) (Four year) from SERB-DST, India Govt.

20182020

Research grant of ~ 25 Lakhs (INR) from BRNS-DAE, India

2017

Reviewer of International journals published by ACS, Elsevier, RSC etc.

2016

Reviewer of Science and Engineering Research Board (SERB), Govt. of India

2016

Featured in “Faculty in Spotlight” of Shiv Nadar University

20122013

Postdoctoral fellowship at the National Institute of Materials Science, Japan

20112012

Postdoctoral fellowship at the Dartmouth College, New Hamshire, USA

20092011

Postdoctoral fellowship at the Bordeaux University, France

20052008

Senior Research Fellowship, Council of Scientific and Industrial Research, India

20022005

Junior Research Fellowship, Council of Scientific and Industrial Research, India

Scholarly Activity

Journal Publications (accepted or published)

2019

H. Bhatia, D. Ray*, Use of Dimeric Excited States of the Donors in D4-A Systems for Accessing White-Light Emission, Afterglow and Invisible Security Ink, https://pubs.acs.org/doi/10.1021/acs.jpcc.9b07762

2019

I. Bhattacharjee, N. Acharya, D. Ray, Thermally Activated Delayed Fluorescence and RoomTemperature Phosphorescence in Naphthyl Appended CarbazoleQuinoline Conjugate, and their Mechanical Regulation. Chem. Commun., 2019, 55, 1899-1902.

2018

I. Bhattacharjee, N. Acharya, S. Karmakar, D. Ray, Room-Temperature Orange-Red Phosphorescence by Way of Intermolecular Charge Transfer in Single-Component Phenoxazine–Quinoline Conjugates and Chemical Sensing, J. Phys. Chem. C 2018, 122, 21589-21597.

2018

H. Bhatia, I. Bhattacharjee, D. Ray, Biluminescence via Fluorescence and Persistent Phosphorescence in Amorphous Organic Donor(D4)−Acceptor(A) Conjugates and Application in Data Security Protection, J. Phys. Chem. Lett. 2018, 9, 3808-3813.

2018

I. Bhattacharjee, N. Acharya, H. Bhatia, D. Ray, Dual Emission through Thermally Activated Delayed Fluorescence and Room-Temperature Phosphorescence, and Their Thermal Enhancement via Solid-State Structural Change in a Carbazole- Quinoline Conjugate, J. Phys. Chem. Lett. 2018, 9, 2733-2738.

2018

I. Bhattacharjee, N. Ghosh, A. Raina, J. Dasgupta, D. Ray, Conformational switching via an intramolecular H-bond modulates the fluorescence lifetime in a novel coumarin–imidazole conjugate, Phys. Chem. Chem. Phys. 2018, 20, 6060-6072.

2015

J. T. Foy, D. Ray, I. Aprahamian, Regulating signal enhancement with coordinationcoupled deprotonation of a hydrazone switch, Chem. Sci. 2015, 6, 209-213.

2012

D. Ray, J. T Foy, R. P. Hughes, I. Aprahamian, A Switching cascade of hydrazone-based rotary switches through coordination-coupled proton relays, Nat. Chem., 2012, 4, 757-762.

2012

G. Raffy, D. Ray, C.-C. Chu, A. D. Guerzo, D. M. Bassani, Effect of Hydrogen-Bonding on the Excited-State Reactivity of Fullerene Derivatives and their Impact on the Control of the Emission Polarization from Single Crystals, Phys. Chem. Chem. Phys. 2012, 14, 8859-8865.

2011

G. Raffy, D. Ray, C.-C. Chu, A. D. Guerzo, D. M. Bassani, Controlling the third property of light: Towards photopolic materials, Angew. Chem. Int. Ed. 2011, 50, 9584-9588.

2011

D. M. Bassani, D. Ray, C.-K. Liang, B. Fabre, F. Hui, P. Hapiot, Anthracene- and anthracene:C60 adduct- terminated monolayers covalently bound hydrogen terminated silicon surfaces, J. Phys. Chem. C 2011, 115, 14786-14796.

2011

D. Ray, C. Liang, N. D. McClenaghan, D. M. Bassani, Organic and Supramolecular Materials for LED and Photovoltaic Applications, Current Physical Chemistry 2011, 1, 169-180.

2011

D. Ray, C. Belin, F. Hui, B. Fabre, P. Hapiot, D. M. Bassani, Direct formation of fullerene monolayers using [4+2] Diels-Alder cycloaddition, Chem. Commun. 2011, 47 (9), 2547-2549.

2010

C.-C. Chu, G. Raffy, D. Ray, A. D. Guerzo, B. Kauffmann, G. Wantz, L. Hirsch, D. M. Bassani, Self-assembly of supramolecular fullerene ribbons via hydrogen-bonding interactions and their impact on fullerene electronic interactions and charge carrier mobility, J. Am. Chem. Soc. 2010, 132, 12717-12723.

2010

D. M. Bassani, L. Jonusauskaite, N. D. McClenaghan, J.-L. Pozzo, D. Ray, G. Vives, Harnessing supramolecular interactions in organic solid-state devices: current status and future potential, Coord. Chem. Rev. 2010, 254, 2429-2445.

2010

D. Ray, A. Nag, A. Jana, D. Goswami, P. K. Bharadwaj, Coumarin Derived Chromophores in the donor-aceeptor-donor format that gives fluorescence enhancement and large two-photon activity in presence of specific metal ions, Inorganica Chimica Acta 2010, 363, 2824-2832.

2009

D. Ray, A. Nag, D. Goswami, P. K. Bharadwaj, Acyclic Donor-Acceptor-Donor Chromophores for Large Enhancement of Two-Photon Absorption Cross Section in Presence of Mg(II), Ca(II) or Zn(II) Ions, J. Luminescenc 2009, 129, 256-262.

2009

D. Ray, E. S. S. Iyer, P. K. Bharadwaj, Ag(I) induced emission with azines having donor-acceptor-donor chromophore, Dalton Trans. 2009, 5683-5687.

2008

D. Ray, P. K. Bharadwaj, A Coumarin-Derived Fluorescence Probe Selective for Magnesium, Inorg. Chem. 2008, 47, 2252-2254. (Citations > 200)

2006

D. Ray, P. K. Bharadwaj, Alteration in the Binding Property of a Laterally Non-symmetric Aza Cryptand Toward Cu(II), Ag(I) and Tl(I) Ions upon Derivatization with Methylnitrile Group, Eur. J. Inorg. Chem. 2006, 1771-1776.

Other

2019

Congratulations to Mr. Rohil Vaidya for achieving Award of Distinction with A Special Cash Prize for Opportunities in Under graduate Research ("OUR") in our research group.

2019

congratulation of Harsh Bhtia for securing SERB international travel grant for Gordon Photochemistry Conference, USA, 2019 

2019

Congratulations to Indranil for his postdoctoral position in Japan (Exciton management and investigation for novel photofunctional materials's group-Prof. Shuzo Hirata)

2019

Congratulation to Indranil and Nirmalya for recent Chem. Commun., 2019, 55, 1899-1902

2018

Congratluation to Dr. Indranil Bhattachrjee for his sucessful defense on 20th of December, 2018.

2018

Congratulation to Mr. Abhinav Raina (first BS-UG student) for his admission to the Masters Program in Chemistry at the University of Cologne, Cologne, Germany.

2018

Congratulations to Mr. Rohil Vaidya for acceptance of OUR project in Ray's Research Group

2018

Congratulation to Mr. Indranil Bhattacharjee for J. Phys. Chem. Lett. 2018, 9(11), 2733-2738. DR thanks ACS for publishing live slide presentation for this phenomenal work 

2018

Congratulation to Mr. Harsh Bhatia for J. Phys. Chem. Lett. 2018, 9(14), 3808-3813. DR thanks ACS for publishing live slide presentation of this work.

2018

Thanks to BRNS (DAE) for awarding a new grant (three years) (2018-2020)

2016

Many thanks to SERB-DST for awarding second consecuitve grant (4 years) (2016-2020)

2016

Congratulations to Harsh Bhatia for his PhD program in Ray's research group (2016)

2015

Congratulation to Saheli Karmakar for her PhD program in Ray's research group (2015)

2017

Congratulation to Nirmalya Acharya for his PhD program in Ray’s research Group(2018)

2015

Thanks to SERB-DST first grant (younf scientist) (2015-2018)

2015

Congratulation to Mr. Abhinav Raina for his OUR and BS research in Ray's group

2014

Congratulation to Mr. Indranil Bhattacharjee for his PhD program in Ray's research group (2014)

Conference/Symposium

2018

Congratulation to Mr. Harsh Bhatia for his consecutive best poster award from Frontiers in Chemical Sciences (FICS 2018), IITG.

2018

Congratulation to Mr. Harsh Bhatia for his best poster award from National workshop on Fluorescence and Raman Spectroscopy (FCS 2018) at JNU.