Nick WilliamsProf. Nicholas H. Williams

Professor in Physical Organic Chemistry and Director of Learning and Teaching

Room: C94

Tel: +44-(0)114-22-29469

Fax: +44-(0)114-22-29436

email:

personal email:

 


 

Biographical Sketch

Prof. Williams obtained his BA in Chemistry from Cambridge in 1988, which was followed by an MA and PhD from the same institution in 1992. After his PhD he was a post doctoral fellow and temporary lector at Trinity College, Cambridge. In 1994 he became a RS/NSERC Research Fellow at McGill University in Montréal. In 1996 he was appointed to a lectureship at the University of Sheffield, where he was promoted to Senior Lecturer in 2003 and then Reader in 2007. In 20011 he was promoted to Professor.

Research Keywords

Physical organic, bioorganic and bioinorganic chemistry. Mechanism, reactivity and catalysis, especially relevant to biology. Functional supramolecular systems. Surface engineering materials.

Teaching Keywords

Organic Chemistry; Biological Chemistry

Selected Publications:

Research Interests

Our research can be broadly described as physical organic chemistry. This is the design, synthesis and systematic study of (mainly) organic molecules. The molecules we are interested in designing are ones which either show fundamental insights into mechanisms, reactivity, recognition and/or catalysis, or exploit the understanding we have to create more complex supramolecular systems. Practically, we think at the molecular level (designing organic molecules with key structural features), make them (organic synthesis), and finally discover how well they function by carefully examining their properties. Currently, we have three main strands of investigation:

Enzymes are remarkably efficient catalysts, operating under mild aqueous conditions; as man made efforts to achieve similar activity are many orders of magnitude less efficient, there is still a great deal that we do not understand. We are investigating well defined model compounds to understand how to combine several functional groups so that they work really effectively together. This helps give a deeper understanding of biological catalysis, and guides us in designing our own biomimetic catalysts. Organic ligands which can bind and control the reactivity of metal ions provide the best catalysts to date, and form the core of our models and catalysts.

We are applying the discovery that individual components of a catalyst can be brought together to achieve cooperative catalysis (i.e. the whole is more effective than the sum of the parts!) towards creating supramolecular systems which can be controlled by recognition processes. This is the type of event which takes place in signalling at cell surfaces, and we are making transmembrane signalling systems which mimic this.

Lastly, based on the discovery that calixarene-like molecules show a remarkable ability to modify the properties of surfaces, we are investigating the key molecular features that this is based on, and what properties we can bring to a wide range of materials. For example, we can already change paper from being highly water and oil absorbent to being both water and oil repellent, without observably changing its appearance. In particular, these molecules will have the potential make ordinary materials into sophisticated biomaterials by creating a new bio-active interface.

Teaching Section

Organic Chemistry

Courses Taught

  • Stereochemistry (Year 2)
    This segment discusses stereochemistry and conformation in organic chemistry.
  • Mechanistic Organic Chemistry (Year 3)
    This segment discusses how to investigate organic reaction mechanisms.
  • Stereoelectronics, Mechanism and Reactivity in Organic Chemistry (Year 4)
    This segment develops and unites your understanding of the factors that contribute to the reactivity and mechanisms of organic compounds, and particularly the role of stereoelectronic effects in influencing the outcome of ionic, pericyclic and radical reactions.

Tutorial & Workshop Support

  • First Year General Tutorials.
  • Second Year Organic Chemistry Tutorials
  • Third Year Workshops.
  • Third Year Literature Review.
  • Fourth Year Workshops.

Laboratory Teaching

  • Fourth Year Research Project.

Journal articles

Conference proceedings papers

  • Chu Y, Hengge AC & Williams NH (2012) A Simple Arg to Lys Mutant of Protein Phosphatase 1 Exhibits Catalytic Efficiencies toward Monoanionic Substrates Superior to Wild Type. FASEB JOURNAL, Vol. 26
  • Chu Y, Williams NH & Hengge AC (2010) Mechanistic study of phosphoryl transfer reactions catalyzed by protein phosphatase-1. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol. 239
  • Humphry T, Forconi M, Williams NH & Hengge AC (2003) Alteration of the mechanisms of phosphate ester hydrolysis by complexation to a dinuclear metal cneter.. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol. 226 (pp U747-U748)
  • KIRBY AJ & WILLIAMS NH (1993) ANOMERIC AND GAUCHE EFFECTS - SOME BASIC STEREOELECTRONICS. ANOMERIC EFFECT AND ASSOCIATED STEREOELECTRONIC EFFECTS, Vol. 539 (pp 55-69)
  • KIRBY AJ & WILLIAMS NH (1992) ANOMERIC AND GAUCHE EFFECTS - SOME BASIC STEREOELECTRONICS. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol. 204 (pp 91-CARB)