Department Seminar
Upcoming Seminar
Conceptually New Clusteroluminescence (CL) Emergent from Clusterization of Non-emissive Molecules
Dr. Ben Zhong Tang, Chinese University of Hong Kong, Shenzhen
October 24, 2024
3:30pm-4:30pm in LA5-248
Luminescence, as a natural gift, plays an essential role in our colorful world. So far, it is believed that the development of highly efficient fluorophores relies on covalently electronic conjugation. The traditional photophysical mechanism based on through-bond conjugation seems to be perfect in explaining the luminescence of most conjugated molecules. However, some inexpensive commodity materials without any aromatic structures, such as peptides, polysaccharides, and some artificial polymers, can emit visible and bright emission. Although this phenomenon has been observed for a long time, it has not attracted much attention as the underlying mechanisms were still unclear, and these materials were hard to utilize as luminescent materials due to their low efficiency. Recent works illustrate that the single-dispersed solutions of these (macro)molecules do not emit light under UV excitation, but their aggregates can emit bright visible light. This kind of concenptually new photoluminescence is named "clusteroluminescence (CL)" and the luminogens with CL characteristics are termed “clusteroluminogens (CLgens)”. Further experiments and theoretical calculations suggest that the through-space electronic interactions between the lone pairs of heteroatoms would form rigid nanocluster structures in the aggregate state, which ultimately emit light as a chromophore. Several approaches have been developed to manipulate the performance of CLgens with controllable CL. In terms of application, CLgens always show excellent biocompatibility, which may find applications as bioimaging or tracking probes. Meanwhile, as the inter- or intra-molecular distance is sensitive to mechanical force, smart mechanically responsive materials can be developed.
Seminars are held on Wednesdays at 4:00pm. All are invited to attend.
Seminar Coordinator
For information and suggestions about our Department Seminar series, please contact the seminar coordinator:
Dr. Fangyuan Tian
Fangyuan.Tian@csulb.edu
Schedule
The following schedule is for Fall 2024.
Date | Title | Speaker and Affiliation |
---|---|---|
October 24 | Conceptually New Clusteroluminescence (CL) Emergent from Clusterization of Non-emissive Molecules | Dr. Ben Zhong Tang, Chinese University of Hong Kong, Shenzhen |
October 30 | Recruitment Talk | TBD, Wayne State University |
November 6 | Discovery and development of synthetic transformations for applications in medicinal chemistry, drug discovery, and natural products synthesis | Jozef Stec, Marshall B. Ketchum University |
November 13 | Chemical education | Renee Link, UC Irvine |
November 20 | Engineering better scaffolds for improved healing of bone defects | Donghui Zhu, SUNY Stony Brook |
December 4 | Computational Protein Design of Immunogens for Neurodegenerative Diseases | Aina Adekunle, CSU Dominguez Hills |
December 11 | The "Rippled" Beta-Sheet: An Old Theory by Pauling and Corey Inspires New Biomaterial | Evgenij Raskatov, UC Santa Cruz |
Previous Seminars
Date | Title | Speaker and Affiliation |
---|---|---|
October 16 | "Click & Clip" Chemistry: Structure-Activity Relationships in Ylidenenorbornadienes | Dr. Daniel Bercovici, California Polytechnic State University, San Luis Obispo |
October 9 | Quantitative Analysis of Protein-Ligand Interactions and Lipid Bilayer Modifications using the Quartz Crystal Microbalance | Dr. Malkiat S. Johal, Pomona College |
October 2 | How on earth did I get here? One man's path from school to industrial entrepreneur | Dr. Jean-Luc Fraikin, Spectradyne Inc. |
September 30 | Hydrogen-Atom Transfer at Metal-Organic Framework-Liquid Interfaces | Dr. Hyunho Noh, University of Oklahoma |
September 25 | Uncovering new pathways of cytoskeletal regulation relevant for neuronal function | Dr. Elena Grintsevich, CSU Long Beach |
September 18 | Taking your Chemistry Degree into the Aerospace Industry | Dr. Michael Kahr, CSU Long Beach alumnus |
September 11 | The Carbonyl-Isocyanide Relationship and Beyond | Dr. Joshua Figueroa, UC San Diego |
September 4 | Programmable DNA-templated metal nanoclusters: science and emerging biophotonics applications | Dr. Stacy Copp, UC Irvine |
The Seminar Archive has Department Seminars from previous semesters.
The Department Seminar is supported by The Allergan Foundation.