N-Annulated Perylene as An Efficient Electron Donor for Porphyrin-based Dyes: Enhanced Light-Harvesting Ability and High-efficiency Co(II/III)-based Dye-Sensitized Solar Cells

A new benchmark dye for dye-sensitized solar cell! In a recent Article published in JACS (http://pubs.acs.org/doi/abs/10.1021/ja409291g), A/P Wu Jishan and his local/international collaborators synthesized a series of N-annulated perylene substituted and fused porphyrin dyes, which showed largely enhanced light harvesting capability in particular in the near infrared region. As a result, one of the dyes exhibited a power conversion efficiency of around 11%, which is comparable and even slightly higher than that of the benchmark dye YD2-o-C8 under same conditions.

Observing High Pressure Chemistry in Graphene Bubbles

The above recent work by the team of Professor Loh Kian Ping has been chosen as a "Hot Paper" by the editors of Angewandte Chemie for its importance in a rapidly evolving field of high current interest. It is also highlighted in Chemistry World published by Royal Society of Chemistry.
Reference: C H Y X Lim, M Nesladek and K P Loh, Angew. Chem., Int. Ed., 2013, DOI: 10.1002/ange.201308682

Read more: Royal Society of Chemistry

Dibenzoheptazethrene Isomers with Different Biradical Characters: An Exercise of Clar’s Aromatic Sextet Rule in Singlet Biradicaloids

Extension of the Clar’s Aromatic Sextet Rule to the singlet biradicaloids!
In a recent Article published in JACS (http://pubs.acs.org/doi/abs/10.1021/ja410279j), A/P Wu Jishan and his local/international collaborators demonstrated that Clar’s Aromatic Sextet Rule can be further extended from the closed-shell polycyclic aromatic hydrocarbons to the open-shell polycyclic hydrocarbon systems, and provides an important guideline for the design of singlet biradicaloids with tailored biradical character and tunable optical, electronic and magnetic properties.

Order–disorder Transition in a Two-dimensional Boron–Carbon–Nitride Alloy

A team lead by Professor Loh Kian Ping reported the mixing and demixing of 2-D boron–nitrogen and carbon phases and found that energetics for such processes are modified by the metal substrate. The brick-and-mortar patchwork observed of stoichiometrically percolated hexagonal boron–carbon–nitride domains surrounded by a network of segregated graphene nanoribbons can be described within the Blume–Emery–Griffiths model applied to a honeycomb lattice.The isostructural boron nitride and graphene assumes remarkable fluidity and can be exchanged entirely into one another by a catalytically assistant substitution. Visualizing the dynamics of phase separation at the atomic level provides the premise for enabling structural control in a 2-D network for broad nanotechnology applications
Read more: Nature Communications

 


 

 

 

 

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Congratulations to our graduate student Raghavender Medishetty for winning the Best Poster Presenter Award at the '6th-HOPE meeting with Nobel Laureates' March 11-15, 2014 in Tokyo, Japan.

Professor JJ Vittal has been invited to give a talk at the Gordon Research Conference on Crystal Engineering, June 1-6, 2014 at Waterville Valley, NH, USA. He was a discussion leader at the last GRC meeting in 2012 on the same topic.

Professor Lee Hian Kee has been placed in the technical trade journal The Analytical Scientist's (print circulation: 21,000; digital circulation: 58,000) "Power List: 100 Most Influential People in the Analytical Sciences"

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