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Articles by Davin Tan
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4 16. Prof Tan has built a stronger base and pipeline of high-quality talent and contributed to translation of research insights from lab to market, which will benefit Singapore and the world. Prof Tan's many achievements and contributions in this respect, are a powerful testament to the critical role of education and research in driving societal progress and global impact. Impact of Singapore’s RIE Plans 17. The stories of our award recipients today trace the evolution from curiosity to impact.
Mechanochemically-Flavoured Three-Way Approach for the Synthesis of K-doped Cu-Fe/ZnO-Al2O3 Catalysts for Converting CO2 to Oxygenates
Mechanochemically-Flavoured Three-Way Approach for the Synthesis of K-doped Cu-Fe/ZnO-Al2O3 Catalysts for Converting CO2 to Oxygenates Three ball-milling methodologies were developed to synthesize the bespoke multi-metallic K-doped Cu-Fe/ZnO-Al2O3 catalysts for the selective hydrogenation of carbon dioxide. Catalytic performance of the catalysts were benchmarked against their solution-based counterparts.
Restriction of Intramolecular Bending (RIB) Enables the Quantitative Design of AIEgens
Restriction of Intramolecular Bending (RIB) Enables the Quantitative Design of AIEgens Weijie Chi, Jianfeng Dai, Chenxu Yan, Davin Tan, Zhiqian Guo and Xiaogang Liu Abstract Fluorescent compounds with aggregation-induced emission (AIE) characteristics (or AIEgens) have garnered significant research interest for various applications. The establishment of new AIE mechanisms coupled with quantitative prediction power is crucial to accelerate the development of novel AIE materials.
Spontaneously Blinking Rhodamine Dyes for Single‐Molecule Localization Microscopy
Graphical Abstract Spontaneously blinking fluorophores have the potential to significantly simplify experimental setups and extend the imaging duration of single-molecule localization microscopy. This review offers an overview of the development of spontaneously blinking rhodamines from 2014 to 2023, as well as an in-depth analysis of the mechanistic aspects of spontaneous blinking.
Guanidine-based biomimetic hydrides for carbon dioxide reduction
Guanidine-based biomimetic hydrides for carbon dioxide reduction† Junbo Chen, ab Haibo Yu, ab Davin Tan *cd and Richmond Lee *ab Abstract The feasibility of various bespoke guanidine-based compounds as biomimetic hydrides were assessed by Density Functional Theory (DFT).
Monitoring Amyloid Aggregation via Twisted Intramolecular Charge Transfer (TICT)-Based Fluorescent Sensor Array
Monitoring Amyloid Aggregation via Twisted Intramolecular Charge Transfer (TICT)-Based Fluorescent Sensor Array Zhaochao Xu, Chao Wang, Wenchao Jiang, Davin Tan, Yiting Chen, Jin Li, Qinglong Qiao, Priya Yadav and Xiaogang Liu Abstract Imaging amyloid-beta (Aβ) aggregation is critical for understanding the pathology and aiding the pre-symptomatic intervention of Alzheimer's disease (AD).
Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions
Abstract We report a simple and generalizable molecular platform that exhibits three emission bands in the crystalline states. The emission maximum can be tuned over a wide range (≳230 nm) by varying excitation wavelengths. Diverse conformations in S0 and three local minima in S1 are crucial to these unique luminescent properties. Abstract Achieving wide-range tunable emission colors, especially in the solid state of single-fluorophore materials, remains a significant challenge.
Real-Time Observation of “Soft” Magic-Size Clusters during Hydrolysis of the Model Metallodrug Bismuth Disalicylate
Colloidal bismuth therapeutics have been used for hundreds of years, yet remain mysterious. Here we report an X-ray pair distribution function (PDF) study of the solvolysis of bismuth disalicylate, a model for the metallodrug bismuth subsalicylate (Pepto-Bismol). This reveals catalysis by traces of water, followed by multistep cluster growth. The ratio of the two major species, {Bi9O7} and {Bi38O44}, depends on exposure to air, time, and the solvent.
Thermal equilibria between conformers enable highly reliable single-fluorophore ratiometric thermometers
Thermal equilibria between conformers enable highly reliable single-fluorophore ratiometric thermometers Fluorescent thermometers based on organic dyes play an important role in the visualization of dynamic temperature topography with high resolution. Many molecular thermometers contain two fluorophores with different temperature responses to achieve ratiometric temperature detection.
Mechanosynthesis of Higher‐Order Cocrystals: Tuning Order, Functionality and Size in Cocrystal Design**
Abstract The ability to rationally design and predictably construct crystalline solids has been the hallmark of crystal engineering research. To date, numerous examples of multicomponent crystals comprising organic molecules have been reported. However, the crystal engineering of cocrystals comprising both organic and inorganic chemical units is still poorly understood and mostly unexplored.
Investigating the solid-state assembly of pharmaceutically-relevant N,N-dimethyl-O-thiocarbamates in the absence of labile hydrogen bonds
Investigating the solid-state assembly of pharmaceutically-relevant N,N-dimethyl-O-thiocarbamates in the absence of labile hydrogen bonds There are many active pharmaceutical ingredients that lack N-H, O-H and S-H hydrogen-bond donor functional groups. N,N-disubstituted O-thiocarbamates are examples of molecules that display such a feature.
Main group mechanochemistry: from curiosity to established protocols
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An enantioconvergent halogenophilic nucleophilic substitution (SN2X) reaction
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(Guanidine)copper Complex-Catalyzed Enantioselective Dynamic Kinetic Allylic Alkynylation under Biphasic Condition
Highly enantioselective allylic alkynylation of racemic bromides under biphasic condition is furnished in this report. This approach employs functionalized terminal alkynes as pro-nucleophiles and provides 6- and 7-membered cyclic 1,4-enynes with high yields and excellent enantioselectivities (up to 96% ee) under mild conditions. Enantioretentive derivatizations highlight the synthetic utility of this transformation.
Orthogonality in Main Group Compounds: Direct One-step Synthesis of Air- and Moisture-stable Cyclophosphazanes by Mechanochemistry
Mechanochemistry has been established to be an environmentally-friendly way of conducting reactions in a solvent-free manner. The development of mechanochemical orthogonal reactions, in which multiple reagents are milled together, can be a powerful strategy to selective yield the desired product. Such orthogonal synthesis, are rare, especially involving main group frameworks – based on bonds other than carbon – have yet to be reported.
Oxidative mechanochemistry for direct, room-temperature, solvent-free conversion of palladium and gold metals into soluble salts and coordination complexes - Do - 2018 - Angewandte Chemie International Edition - Wiley Online Library
Noble metals are valued critical elements whose chemical activation or recycling is challenging, traditionally requiring high temperatures, strong acids or bases, or aggressive complexation agents.
Enantioselective 1,2-Anionotropic Rearrangement of Acylsilane through a Bisguanidinium Silicate Ion Pair
Highly enantioselective bisguanidinium-catalyzed tandem rearrangements of acylsilanes are reported. The acylsilanes were activated via an addition of fluoride on the silicon to form a penta-coordinate anionic silicate intermediate.
Carbodiimide insertion into sulfonimides: one-step route to azepine derivatives by a two-atom saccharin ring expansion
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Carbodiimide insertion into sulfonimides: one-step route to azepine derivatives via a two-atom saccharin ring expansion
We welcome your comments for improvement of this site and our services. Please enter the characters in the box below as you see them. Thank you for helping us improve our site.
Towards medicinal mechanochemistry: evolution of milling from pharmaceutical solid form screening to the synthesis of active pharmaceutical ingredients (APIs) - Chemical Communications (RSC Publishing)
This overview highlights the emergent area of mechanochemical reactions for making active pharmaceutical ingredients (APIs), and covers the latest advances in the recently established area of mechanochemical screening and synthesis of pharmaceutical solid forms, specifically polymorphs, cocrystals, salts and salt cocrystals.
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