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Dr M. Cristina Lagunas

Dr. M. Cristina Lagunas

Dr M. Cristina Lagunas
BSc (University of Murcia, Spain), 1989
PhD (University of Murcia, Spain), 1993

Lecturer in Inorganic Chemistry

Tel:     + 44 (0) 28 9097 4336
Fax:    + 44 (0) 28 9097 6524
E-mail: c.lagunas@qub.ac.uk

Research Keywords

Coordination chemistry
Gold chemistry
Aurophilicity
Luminescence
Sensors
Ionic liquids

 

Research

Our research focuses in coordination chemistry and ionic liquids.
We are currently interested in the following topics:

 

Aurophilicity and luminescence

Gold(I) complexes tend to form short Au∙∙∙Au (aurophilic) contacts that influence their luminescent properties. Analogous, less strong, contacts are also found for other d10 metals.

Our work focuses on:

- Molecular sensors and probes: Emission at a specific wavelength can be switched ‘on’ and ‘off’ by altering the metal∙∙∙metal contacts.

- Solution EXAFS studies: It is essential to evaluate the strength of the contacts in dissolved complexes. We use EXAFS to measure aurophilic and other weak interactions in solution.

Fig 1
Luminescent [Au2Cu2]2+
cluster formed upon addition
of Cu+ to a Au(l) complex.

 

Visual sensors for volatile compounds

There is a need for fast, simple and highly sensitive methods to measure gases (e.g., monitoring of emissions, early leak detection, occupational exposure, etc.).

We use metal compounds that change colour in the presence of a volatile, such as ethylene, for fast in situ visual detection.

Fig 2
Visual ethylene sensor developed in our group

 

Ionic liquids

Ionic liquids are solvents formed only by ions that can replace molecular solvents in chemical processes, and allow for new exciting chemistry to be developed.

Our work with ionic liquids spans from electrochemistry to inorganic synthesis, metal-catalysed reactions and nanomaterials.

Fig 3
Uuusual electroless deposition of Au nanostructures
on glassy carbon from a H[AuCl4] / ionic liquid solution