Circularly Polarized Luminescence in Nanoassemblies: Generation, Amplification, and Application

Abstract

Yutao Sang obtained his B.Sc. and M.Sc. degrees in chemistry from Qingdao University, China. In 2016, he enrolled on a Ph.D. course at the Institute of Chemistry, Chinese Academy of Sciences (ICCAS), under the supervision of Prof. Minghua Liu, where he is currently in his third year. His ongoing research includes supramolecular chirality, chiroptical materials, and symmetry breaking of achiral molecules in gels and related systems. Pengfei Duan received his Ph.D. degree from the Institute of Chemistry, Chinese Academy of Sciences (CAS) in 2011 with Prof. Minghua Liu on chiral selfassembly in colloid and interface chemistry. He was a postdoctoral research fellow with Prof. Nobuo Kimizuka at Kyushu University, working on photon upconversion in self-assembled systems. In 2015, he became a professor at the National Center for Nanoscience and Technology (NCNST). His current research interests focus on photochemistry and photophysics in chiral supramolecular systems.

Finely Controlled Circularly Polarized Luminescence of a Mechano‐Responsive Supramolecular Polymer

“…This result again confirms that the handedness of the supramolecular polymer l-1 was not determined by the external stimulus-like rotation direction. 1 HNMR spectra changes of l-1 by change of temperature were observed (Supporting Information, Figure S16). Tw oN À Hproton peaks of l-1 with blue emission, prepared by stirring for 1day,w ere observed at 7.79 and 7.64 ppm at 298 K, respectively,which were shifted 0.16 and 0.17 ppm downfield compared to those at 333 K. These chemical shifts were clear evidence for the dissociation of the intermolecular H-bonds (explained in detail in the Supporting Information).…”

“…Circularly polarized luminescence (CPL) is au nique chiroptical property of chiral emission systems and is regarded as one of the most important tools for investigating the excitedstate properties of chiral materials. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Materials exhibiting CPL are of great interest not only for understanding the mystery of chirality but also for potential important applications,s uch as chiroptical recognition sensors, [8,9] noninvasive biomedical diagnosis in the biological field, [10][11][12][13] and catalysts for asymmetric chemical synthesis. [14,15] Mechano-responsive materials also usually exhibit emission properties under mechanical stress.…”

Highly enantioselective photo-polymerization enhanced by chiral nanoparticles and in situ photopatterning of chirality

“…Such high optical activity could be attributed to mostly the high asymmetry factor in PDA itself. (Note that the excitation wavelength is not far from the plasmon resonance of AgNPs, and this may influence chiral asymmetry in the fluorescence as well 4 .) The sign and value of g lum could also be fine-tuned by simply controlling the ratio between the irradiations with 254 and 313 nm unpolarized light.…”

“…Chiral conjugated polymers, particularly those with strong circularly polarized luminescence, have recently gained increasing interest as they promise many potential applications in quantum computing, chiral recognition-based biosensing, chiroptical metamaterials, etc. 4 . In the past decades, many strategies have been developed to synthesize chiral conjugated polymers 5 , typically using chiral monomers 6 , dopants, catalysts 7 , or asymmetric external influences including circularly polarized light (CPL) 8,9 , vortex motion 10 , stirring 11 and other physical forces 12 , as the symmetry breaker.…”

Aggregate Science: From Structures to Properties

“…the complementarity of aggregate formation and aggregated materials to studying and using "isolated" single-molecule materials regarding the creation of hierarchical structures. [153][154][155] In some biological applications, admixtures also activate specific functions. For example, 4-hydroxybenzylideneimidazolinone (HBI) has been identified as the chromophore of green fluorescent protein (GFP).…”