A new member in AIE family

September 24, 2019

Aggregation-induced emission (AIE) was first reported by Tang`s group in 2001. Many research efforts have been devoted to the exploration structure-property-application of AIE. The focal points and hot spots of AIE are to design new structural systems and to illuminate the relationship of structural properties. Many new compounds with AIE characteristics have been designed and synthesized to enrich the members in AIE family. However, there are almost no reports thus far on the analog 1,1,2,4-tetraphenyl-1,3-butadiene (TPB) that was studied in AIE fields.

Recently, Professor Yuping Dong's group, from Beijing Institute of Technology, demonstrated a new member of AIE family: TPB with conformational sensitivity. The experimental results show that TPB-1, TPB-2 and TPB-3 have typical AIE characteristics, that is, there is no fluorescence in the solution, and strong fluorescence in the aggregate state. Unlike the existing AIE molecules, the TPB derivative does not have a strong electron-withdrawing electron group. The emission wavelength of the aggregated state is nearly 80 nm larger than that of the molecular state. All the experimental results indicated that 4-position of arylene group had a sensitively changing conformation in different state, which resulted in the emission wavelength movement.

Conformational sensitivity was used to monitor the critical transition point of polyelectrolyte complexes of PSS/PADAMA in different KBr concentration. Inserting TPB-3 molecule into PSS/PADAMA system with a mass fraction of 0.15% detected the critical transition point of PSS/PADAMA polyelectrolyte complexes in about 1.8 mol/L of KBr.
-end-
See the article: Zhang Y, Xu H, Xu W, Zhang C, Shi J, Tong B, Cai Z, Dong Y. Conformational sensitivity of tetraphenyl-1,3-butadiene derivatives with aggregation-induced emission characteristics. Sci. China Chem., 2019, DOI: 10.1007/s11426-019-9576-7.

http://engine.scichina.com/publisher/scp/journal/SCC/doi/10.1007/s11426-019-9576-7

Science China Press

Related Aggregate State Articles from Brightsurf:

How hard is it to vote in your state?
A new analysis identifies U.S. states that make it easiest, and those that make it more challenging, to register and vote.

State gun laws may help curb violence across state lines: study
Columbia University Mailman School of Public Health researchers find that strong state firearm laws are associated with fewer firearm homicides--both within the state where the laws are enacted and across state lines.

Arctic transitioning to a new climate state
The fast-warming Arctic has started to transition from a predominantly frozen state into an entirely different climate with significantly less sea ice, warmer temperatures, and more rain, according to a comprehensive new study of Arctic conditions.

Opioid prescriptions for knee surgery vary widely from state to state
New research from Texas A&M University and the University of Pennsylvania on opioid prescribing practices across the country after outpatient knee surgeries found that prescription strength and number of tablets is prescribed highest in Oklahoma and lowest in Vermont.

The spin state story: Observation of the quantum spin liquid state in novel material
The quantum spin liquid (QSL) state is an exotic state of matter where the spin of electrons, which generally exhibits order at low temperatures, remains disordered.

Forest Service debuts state-by-state statistics on carbon
Overview of the status and trends of greenhouse gas emissions and removals from forest land, woodlands, hardwood products, and urban trees nationally gets 49 times better with new state-by-state reporting.

Canada lynx disappearing from Washington state
Canada lynx are losing ground in Washington state, even as federal officials are taking steps to remove the species' threatened status under the Endangered Species Act.

New Yorkers think feds not doing enough for the city and state
A majority (56%) of New York City residents did not think the assistance provided by the federal government for NYC and the state as a whole is sufficient to manage the current coronavirus crisis.

New state-of-the-MOF materials
Metal-organic frameworks (MOFs) are porous, crystalline materials that can trap compounds within their molecular cavities, giving them a wide range of applications in gas storage and separation, carbon capture, and in the catalysis of chemical reactions, to name a few.

State of mind: The end of personality as we know it
In a study published today researchers propose that changing states of mind are holistic in that they exert all-encompassing and coordinated effects simultaneously on our perception, attention, thought, affect, and behavior.

Read More: Aggregate State News and Aggregate State Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.