38399-21-2

Upstream product

• 38399-20-1 2-bromo-3-(bromomethyl)naphthalene 
• 603-35-0 triphenylphosphine 
• 20717-80-0 2-bromo-3-carboxynaphthalene 

Downstream Products

• 38399-51-8 (Z)-2-bromo-3-(2-bromostyryl)naphthalene 
• 38399-52-9 (E)-2-bromo-3-(2-bromostyryl)naphthalene 
• 38399-23-4 C₁₈H₁₀Br₄ 
• 38399-17-6 2-Bromo-3-(2-bromo-phenylethynyl)-naphthalene 
• 38399-22-3 2-Bromo-3-[1,2-dibromo-2-(2-bromo-phenyl)-ethyl]-naphthalene 

Relevant academic research and scientific papers

Controlling the S1energy profile by tuning excited-state aromaticity

The shape of the lowest singlet excited-state (S1) energy profile is of primary importance in photochemistry and related materials science areas. Here we demonstrate a new approach for controlling the shape of the S1 energy profile which relies on tuning the level of excited-state aromaticity (ESA). In a series of fluorescent π-expanded oxepins, the energy decrease accompanying the bent-to-planar conformational change in S1 becomes less pronounced with lower ESA levels. Stabilization energies following from ESA were quantitatively estimated to be 10-20 kcal/mol using photophysical data. Very fast planarization dynamics in S1 was revealed by time-resolved fluorescence spectroscopy. The time constants were estimated to be shorter than 1 ps, regardless of molecular size and level of ESA, indicating barrierless S1 planarization within the oxepin series.

COMPOUND AND POLYMER COMPOUND CONTAINING THE COMPOUND

Provided is a compound having higher fluorescence quantum yield and higher optical stability than a conventional FLAP and a polymer compound containing the compound. A: seven or eight-membered ring structure, Y1,Y2,Y3: hal