Gautam Radhakrishna Desiraju

Gautam Radhakrishna Desiraju is an Indian structural chemist, educationist and an emeritus professor at the Indian Institute of Science.

These weak hydrogen bonds had been discussed sporadically since the 1930s, but it was only after the 1980s that the idea of a weakly activated group forming hydrogen bonds gained acceptance in the chemical community.

Desiraju was among the few structural chemists who argued in those early days that the C-H...O and other weak interactions have a hydrogen bond character.

Desiraju has authored around 479 research papers and a total of 512 publications as given in the Web of Science.

In addition to the three books on crystal engineering and hydrogen bonding, he has edited three multi-author books on these topics in structural chemistry.

He has guided the PhD work of nearly 40 students over the past 43 years.

Desiraju has authored several commentaries on science, the evolution of chemistry as a subject, emergence and complexity, and research habits and practices in various cultures.

He has also written articles about the state of science education and research in India,, and about the current status of chemistry research in India, where he has identified problems and suggested solutions in situations that are, in part, expected in a country that is rooted in the traditional but yet aspires for the contemporary.

Despite being American-educated Desiraju strongly believes that if a sense of "Indian-ness" is inculcated in Indian students and young scientists, a modern

competitive spirit and adherence to professionalism will enter the education and research area of India automatically.

He feels that this essential spirit is now largely lacking and that it is the chief cause of the present sluggishness in our R&D sectors.

It is in this spirit that he has written his most recent book "Bharat: India 2.0" which describes India as a civilisational state where the concept of dharma needs to be explicitly invoked in the constitution and where the full diversity of the country is optimally showcased.

In talks he praises the visions of Savarkar, speaks against the separation of Pakistan from British India.

His has written four books.

He had his schooling in Cathedral and John Connon Boys School in Bombay and obtained his BSc (1972) from St. Xavier's College, Bombay.

He obtained his PhD (1976) from University of Illinois at Urbana-Champaign where he worked under the supervision of David Y. Curtin and Iain C. Paul.

He worked between 1976 and 1978 in the Research Laboratories of Eastman Kodak Company in Rochester, NY.

From 1978 to 1979 he was a research fellow in the Indian Institute of Science, Bangalore.

He joined the University of Hyderabad in 1979 as a lecturer and was promoted as reader in 1984 and professor in 1990.

He spent a year (1988–1989) in the CR&D department of DuPont in Wilmington as a visiting scientist.

He worked on crystal engineering and weak hydrogen bonding where he has published seminal texts in 1989 and 1999.

His first (single author) book on crystal engineering (1989) has around 4000 cites.

His second book (co-authored with Thomas Steiner in 1999) on the weak hydrogen bond has around 7500 cites.

After 30 years in the University of Hyderabad, he joined the Indian Institute of Science in Bangalore in 2009.

He is a member of the editorial advisory boards of Angewandte Chemie, Chemical Communications and the Journal of the American Chemical Society.

He was the chair of the first Gordon Research Conferences in Crystal Engineering, 2010 and is now a member of the Vice Chancellor's Strategic Advisory Council of the University of Petroleum & Energy Studies (UPES).9 Dehradun, as well as a member of the Academic Council of Rishihood University Sonepat.

He is a recipient of an honorary doctorate degree of the Universidad Nacional de Córdoba, Argentina, the Rayalaseema University, Kurnool and of the Gulbarga University, Kalaburagi.

He co-authored a textbook in crystal engineering (2011).

With more than 65000 citations and an h-index of 104 he is the second most highly cited scientist in India.

He has written a book entitled "Bharat: India 2.0" in 2022 in which he argues that the present constitution is inadequate for a 5000 year civilisation.

Gautam Desiraju was born in Madras, India.

He is a past president of the International Union of Crystallography during 2011–2014.

He was awarded the Acharya P. C. Ray Medal (2015) of the University of Calcutta for innovation in science and technology, the ISA Medal (2018) for Science of the University of Bologna and the van der Waals Prize (2023) by ICNI, Strasbourg.

Desiraju's contribution to the subject of crystal engineering has focus on the concept of the supramolecular synthon, which is a small sub-structural unit that is an adequate enough representation of the entire crystal structure of a molecular solid.

The major problem in crystal engineering is that the prediction of a crystal structure from a molecular structure is very difficult and not easily derivable from functional groups.

Identification of supramolecular synthons simplifies this otherwise intractable problem.

The supramolecular synthon concept is now widely used by crystal engineers in the design of molecular crystals and pharmaceutical co-crystals, which are important from scientific and commercial viewpoints.

Crystal engineering is effectively like supramolecular synthesis in the solid state, and there is a direct analogy between the supramolecular synthon of Desiraju and the molecular synthon that was proposed for organic synthesis by E. J. Corey.

Desiraju's second area of contribution focuses on weakly activated groups like the C-H group can act as donors of hydrogen bonds in molecular and biomolecular systems.

He organized, in August 2017, the 24th Congress and General Assembly of the International Union of Crystallography in Hyderabad.