Ashoka University: Leading Liberal Arts and Sciences University

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Deepak Asthana

Assistant Professor of Chemistry

Ph.D., Jawaharlal Nehru University, New Delhi.

Deepak obtained his doctoral degree (2013) from the School of Physical Sciences (SPS), Jawaharlal Nehru University (JNU), New Delhi, India. In 2014, Deepak was awarded with the prestigious JSPS fellowship by the Japan Society for the Promotion of Sciences academy to pursue two years of postdoctoral research at Kyushu University, Japan. As a JSPS fellow, Deepak started working on lipid-assisted triplet-triplet annihilation-based photon up-conversion (TTA-UC) in aqueous systems. Deepak’s fascination with giant molecular systems, rings, rotaxanes and molecular cages finally made him travel across the world from Japan to the United Kingdom (UK). In December 2016 Deepak joined the Molecular Magnets group at the School of Chemistry, The University of Manchester, UK. Working with Prof. Richard E. P. Winpenny in the molecular magnets team, Deepak spent his most of the time synthesising and modifying octanuclear heterometallic {Cr7M} wheels to generate complex multi-qubit systems. In April 2021, Deepak joined the Chemistry Department at Ashoka University.

 

Deepak’s current research interests are about designing new molecular materials for light harvesting and opto-electronic applications. The primary focus is on the synthesis of ideal fluorescent systems capable of exhibiting exciting optical properties, specially, circularly polarised luminescence (CPL). Utilizing LEGO-chemistry, Deepak aims to design highly efficient light harvesting systems for photon up-conversion of low intensity lights. Deepak is also interested in design and synthesis of rotaxane and catenane based materials with particular interest in systems allowing external stimuli-based mechanical activities.

1. Gold(i) bridged dimeric and trimeric heterometallic {Cr7Ni}-based qubit systems and their characterization

D. Asthana, S. J. Lockyer, S. Nawaz, R. J. Woolfson, G. A. Timco, page1image1904096864C. A. Muryn, I. J. Vitorica-Yrezabal, D. Collison, N. A. Burton and R. E. P. Winpenny Dalton Trans., 2021, 50, 4390.

2. Aqueous photon upconversion by self-assembled acceptor-amphiphile ion-pairs with a long triplet lifetime

D. Asthana, S. Hisamitsu, Masa-aki Morikawa, P. Duan, T. Nakashima, T. kawai, N. Yanaia and N. Kimizuka

Organic Materials, 2019, 01, 043.

3. A [13]rotaxane assembled via a palladium molecular capsule;

J. Ferrando-Soria, A. Fernandez, D. Asthana, S. Nawaz, I. J. Vitorica-Yrezabal, G. F.S. Whitehead, C. A. Muryn, F. Tuna, G. A. Timco, N. D. Burton and R. E. P. Winpenny

Nature Commun., 2019, 10: 3720.

4. Formation of an interlocked double-chain from an organic–inorganic [2]rotaxane;

J. Ferrando-Soria, A. Fernandez, I. J. Vitorica-Yrezabal, D. Asthana, C. A. Muryn, F. Tuna, G. A. Timco, and R. E. P. Winpenny

Chem. Commun., 2019, 55, 2960.

5. Appending diverse π-extended acceptors with DTF donors: Multistate redox, radical ion generation and mid-IR absorbing mixed-valence states;

S. K. keshri, D. Asthana, Y. Kumar, S. Chorol and P. Mukhopadhyay

Chem. E. J., 2018, 24, 1821.

6. All-or-None Switching of Photon Up-conversion in Self-Assembled Organogel Systems;

P. Duan, D. Asthana, T. Nakashima, T. Kawai, N. Yanai and Nobuo Kimizuka

Faraday Discuss., 2017, 196, 305.

7. Assorted morphosynthesis: access to multi-faceted nano-architectures from a super-responsive dual π-functional amphiphilic construct;

D. Asthana, J. Shukla, S. Dana, V. Rani, M. R. Ajayakumar, K. Rawat, K. Mandal, P. Yadav, S. Ghosh and P. Mukhopadhyay

Chem. Commun., 2015, 51,15237.

8. TCNQ as a highly sensitive off-the-shelf detector for cyanide with multi-dimensional  signal read-out ability;

M. R. Ajayakumar, K. Mandal, K. Rawat, D. Asthana, R. Pandey,  A. Sharma, S. Yadav, S. Ghosh and P. Mukhopadhyay,

ACS Appl. Mater. Interfaces, 2013, 5, 6996.

9. Urea-based constructs readily amplify and attenuate nonlinear optical activity in response to H-bonding and anion recognition;

D. Asthana, R. Pandey and P. Mukhopadhyay,

Chem. Commun., 2013, 49, 451.

10. NTCDA-TTF first axial fusion: emergent NIR optical, attractive electronic and a unique high optical contrast light-driven scissoring;

D. Asthana, M. R. Ajayakumar, R. P. Pant and P. Mukhopadhyay,

Chem. Commun., 2012, 48, 6475.

11. Core-modified naphthalenediimides generate persistent radical anion and cation: New   panchromatic NIR probes;

M. R. Ajayakumar, D. Asthana and P. Mukhopadhyay,

Org. Lett., 2012, 14, 4822.

12. Assemblies of perylene diimide derivatives with melamine into luminescent hydrogels;

P. K. Sukul, D. Asthana, P. Mukhopadhyay, D. Summa, L. Muccioli, C. Zannoni, D. Beljonne, A. E.  Rowan and S. Malik,

Chem. Commun., 2011, 47, 11858.

13. An all-organic steroid–D–π-A modular design drives ferroelectricity in supramolecular solids and nano-architectures at RT;

D. Asthana, A. Kumar, A. Pathak, S. Malik, P. K. Sukul, R. Chatterjee, S. Patnaik, K. Rissanen and P. Mukhopadhyay,

Chem. Commun., 2011, 47, 8928.

Functional Molecular and Supramolecular Materials for Electron Transfer Reactions and their Applications;

S. K. Keshri, S. Dana, M. R. Ajayakumar, D Asthana and P. Mukhopadhyay

Book Chapter: Functional Supramolecular Materials: From Surfaces to MOFs, 2017, 110-179, DOI:10.1039/9781788010276-00110a

Study at Ashoka

Study at Ashoka