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
Make Caffeine Visible: A Fluorescent Caffeine "Traffic Light" Detector
Caffeine has attracted abundant attention due to its extensive existence in beverages and medicines. However, to detect it sensitively and conveniently remains a challenge, especially in resource-limited regions. Here we report a novel aqueous phase fluorescent caffeine sensor named Caffeine Orange which exhibits 250-fold fluorescence enhancement upon caffeine activation and high selectivity. Nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy indicate that p-stacking and hydrogen-bonding contribute to their interactions while dynamic light scattering and transmission electron microscopy experiments demonstrate the change of Caffeine Orange ambient environment induces its fluorescence emission. To utilize this probe in real life, we developed a non-toxic caffeine detection kit and tested it for caffeine quantification in various beverages. Naked-eye sensing of various caffeine
concentrations was possible based on color changes upon irradiation with a laser pointer. Lastly, we performed the whole system on a microfluidic device to make caffeine detection quick, sensitive and automated.
Read more: ABC News, RealClearScience
Room-Temperature Ice Growth on Graphite Seeded by Nano-Graphene Oxide†
The Stenocara beetle in the Namib Desert collects drinking droplets from the morning mist using its waxy wings, which are tailored with sub-millimeter hydrophilic humps. The team of Loh Kian Ping discovers that superhydrophilic graphene oxide nanoflakes are biomimetic analogues of these humps and can seed ice nucleation on hydrophobic graphite at temperature well above freezing point. Various ice solids can thus be grown at ambient conditions (see images) and the team performed a dynamic visualization of 2D ice growth at room temperature using AFM. The work is now published in Angewandte Chemie “Room Temperature Ice Growth on Graphite seeded by Nano Graphene Oxide.
Yi Zheng, Chenliang Su, Jiong Lu, Kian Ping Loh*
Tetracyano- Quaterrylene and Hexarylenequinodimethanes with Tunable Ground States and Strong Near-infrared Absorption
Biradicaloids based on extended quinoidal rylenes! In a recent Communication published in Angew. Chem. Int. Ed. (http://onlinelibrary.wiley.com/doi/10.1002/anie.201305348/abstract), A/P Wu Jishan and his local/international collaborators reported the challenging synthesis of soluble and stable tetracyano- quaterrylenequinodimethane QR-CN and hexarylenequinodimethane HR-CN. It turned out that QR-CN has a closed-shell quinoidal structure in the ground state while HR-CN has a singlet briadical ground state. Both compounds showed very strong one-photon and two-photon absorption in the NIR range!
Development of a fluorescent sensor for an illicit date rape drug – GBL
The first fluorescent sensor for an illicit date rape drug, GBL, was developed and named Green Date. It shows high fluorescence enhancement to GBL and allows its detection in different drinks. The mechanism between GBL and Green Date was explored. This discovery may help to prevent the drug-facilitated sexual assault problems.
NEWLY RENOVATED, FULLY AIR-CONDITIONED TEACHING LABORATORIES
Congratulation to Assoc Prof Lai Yee Hing for winning the Teaching Honour Roll Award AY2012/2013.
Congratulation to Dr Zhang Sheng for winning the Excellent Young Teacher Award AY2012/2013.
Congratulation to Fung Fun Man for winning the Teaching Assistant (Full-time) Award AY2012/2013.
Congratulation to Mr Chen Litai, Jeremiah , Mr Irwan Iskandar Bin Roslan, Ms Lee Si Ni and Mr Yu Zongrong, Wesley for winning the Teaching Assistant (Part-time) Award AY2012/2013.
Congratulation to Assoc Prof Lu Yixin for winning the 2013 Outstanding Scientist Award.
Congratulation to Assoc Prof Chen Wei and Dr Yeung Ying Yeung for winning the 2013 Young Scientist Award.
Congratulation to Ms Chan Yi Zhen June, Ms Jiang Xiaohui, Mr Lee Yoon Kuang, Mdm Lim Nyoon Keow, Mr Phua Wei De Victor, Mdm Tan Geok Kheng, Ms Tan Lay San, Mdm Toh Soh Lian and Mdm Wong Lai Kwai for winning the 2013 Outstanding Service Award.
Congratulation to Mr Abdul Rahaman Bin Mohd Noor, Mdm Lim May Lee and Mdm Valli d/o Arunasalam for winning the 2013 Commendation Award.
Congratulation to Assoc Prof Wu Jishan and Dr Yeung Ying Yeung for winning the 2013 Outstanding Chemist and 2013 Young Chemist Award.
Ang Kok Peng Memorial Award is open for application
Note: From 3rd July 2013, information relevant
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