123172-87-2Relevant academic research and scientific papers
Systematic Modifications of a Simple Tolan: Another Category of Viscosity Sensor
Hong, Jung-Ho,Ko, Min-Sung,Rao, P. Sankara,Cho, Dong-Gyu
, p. 10085 - 10089 (2019)
The first tolan derivative-based viscosity sensor (5d) has been synthesized, and its fluorescence intensity and lifetime increase when the viscosity of the solvent increases in methanol-glycerol mixtures. Phthalide (5d) was selected among structurally div
Naphthyl- and Quinoline-Appended o-Carboranyl Luminophores: Intramolecular Charge Transfer-Based Radiative Decay Controlled by Structural Geometry around C?C Bond Axis
Ryu, Chan Hee,Lee, Seok Ho,Yi, Sanghee,Hong, Ju Hyun,Im, Sehee,Lee, Kang Mun
, p. 4875 - 4881 (2021/11/13)
Naphthyl- and quinoline-appended o-carboranyl compounds, NCB and QCB, respectively, were prepared and characterized by multinuclear nuclear magnetic resonance spectroscopy, elemental analysis, and single crystal X-ray diffraction. Although both the compounds were non-emissive in the solution state at 298 K, they were photoluminescent in the rigid state (in THF at 77 K and film state) in the region 450–550 nm. Theoretical calculation of the optimized structure in the S1 state suggested that the low-energy emissive bands for NCB and QCB were attributed to intramolecular charge transfer (ICT) transition. Intriguingly, the C?C bond axis of the o-carborane in NCB in the solid state was more orthogonal to the plane of the appended aromatic group than that in QCB, indicating relatively high delocalization between the o-carborane and aromatic moieties of NCB. The quantum efficiency and radiative decay constant of the ICT-based emission of NCB in the film state were much higher than those of QCB. These findings imply that the structural geometry around the C?C bond axis of the o-carborane is a decisive factor in accelerating the ICT-based radiative decay in the o-carbonyl luminophores in the rigid state.
Palladium-Mediated Transformations of Heteroaromatic Triflates
Crisp, Geoffrey T.,Papadopoulos, Spiros
, p. 279 - 285 (2007/10/02)
Quinolyl triflates and isoquinolyl triflates undergo palladium-catalysed couplings with organostannanes, organoaluminiums and activated alkenes.The range of organic groups which can be transferred to the heteroaromatic substrate includes aryl, vinyl, alkynyl, alkyl and hydride.
