1359981-12-6Relevant articles and documents
Donor-acceptor architectures of tetraphenylethene linked aza-BODIPYs: Synthesis, crystal structure, energy transfer and computational studies
Balsukuri, Naresh,Das, Aritra,Gupta, Iti,Lone, Mohsin Y.,Manav, Neha,Mori, Shigeki,Sen, Pratik
, (2020/02/04)
This work is focused on the design and synthesis of donor-acceptor pairs comprising of aza-BODIPY and tetraphenylethene (TPE) fluorogens with large pseudo Stokes shifts (386–424 nm). Femtosecond transient absorption spectroscopy, single crystal X-ray technique and TD-DFT studies were used to get more insight about their spectral behavior. As compared to the tetra-phenylaza-BODIPY, the four aza-BODIPYs exhibited 50–90 nm red shifted absoprtion and emission spectra. When the donor-acceptor architectures were excited at 300 nm, the aza-BODIPY unit emitted strong fluorescence in red region. This suggested an intramolecular energy transfer between donor (TPE) and the aza-BODIPY acceptor; with 81–90% energy transfer efficiencies. Femtosecond transient absorption studies also supported energy transfer process in the molecules, with 3.7 ps time constant associated with it. Aggregation studies in THF/n-heptane solution showed hypsochromic shifts in the aggregated form; X-ray packing structures indicated H-type aggregates (slip angle > 54.7°) in the solid state. Scanning electron microscopy (SEM) measurement revealed 200–700 nm size sphere shaped structures in the aggregated forms.
A class of wavelength-tunable near-infrared aza-BODIPY dyes and their application for sensing mercury ion
Liu, Shujuan,Shi, Zhengjian,Xu, Wenjuan,Yang, Huiran,Xi, Na,Liu, Xiangmei,Zhao, Qiang,Huang, Wei
, p. 145 - 153 (2014/01/17)
We present the design, synthesis, photophysical properties and application for sensing mercury ion, of a series of excellent near infrared fluorescent aza-boron-dipyrromethene (aza-BODIPY) dyes. The introduction of different aromatic substituents to the a
Synthesis and Studies of Aza-BODIPY-Based π-Conjugates for Organic Electronic Applications
Khan, Tamanna K.,Sheokand, Preeti,Agarwal, Neeraj
, p. 1416 - 1422 (2015/10/05)
Aza-boron-dipyromethene (aza-BODIPY) derivatives 1-6 were synthesized for the first time by employing the palladium catalyzed Suzuki-Miyaura coupling on dibromo-aza-BODIPY. Photophysical and electrochemical properties of these compounds were studied in solution. Absorption and emission maxima were observed in the near-infrared (NIR) region and were found to extend up to 754 and 751 nm, respectively. NIR fluorescence quantum yields in chloroform were as high as 0.45. Optical band gaps were measured from the onset of absorption spectra in thin films and were found to be low (ca. 1.2-1.4 eV). Electrochemical studies provided insight into the reduction potentials of these compounds and consequently the electron affinity (EA). High electron affinity (ca. 4.5) was observed for these dyes. NIR absorption and emission, good quantum yield, and high electron affinity of these compounds promise their applications in microscope imaging and optoelectronic devices, mainly in solar cells and field-effect transistors.