1449686-80-9

Upstream product

• 73183-34-3 bis(pinacol)diborane 
• 736928-22-6 2-bromo-9-phenyl-9-hydroxyfluorene 
• 100-58-3 phenylmagnesium bromide 
• 3096-56-8 2-bromofluoren-9-one 

Downstream Products

• 1449686-81-0 9',9''''-([2,2'-bithiophene]-5,5'-diyl)bis(9'-(4-(octyloxy)phenyl)-9,9''-diphenyl-[2,2':7',2''-terfluorene]-9,9''-diol) 

Relevant academic research and scientific papers

Supramolecular Non-Helical One-Dimensional Channels and Microtubes Assembled from Enantiomers of Difluorenol

The design and assembly of photoelectro-active molecular channel structures is of great importance because of their advantages in charge mobility, photo-induced electron transfer, proton conduction, and exciton transport. Herein, we report the use of racemic 9,9′-diphenyl-[2,2′-bifluorene]-9,9′-diol (DPFOH) enantiomers to produce non-helical 1D channel structures. Although the individual molecule does not present any molecular symmetry, two pairs of racemic DPFOH enantiomers can form a C2-symmetric closed loop via the stereoscopic herringbone assembly. Thanks to the special symmetry derived from the enantiomer pairs, the multiple supramolecular interactions, and the padding from solvent molecules, this conventionally unstable topological structure is achieved. The etching of solvent in 1D channels leads to the formation of microtubes, which exhibit a significant lithium-ion conductivity of 1.77×10?4 S cm, indicating the potential research value of this novel 1D channel structure.

Synergistic steric pairing effects of terfluorenes with ternary side groups on β-conformation transition: Experiments and computations

Rational molecular design has led to the achievement of β-conformations of terfluorenes that are usually difficult for oligoalkylfluorenes with less than 5 repeat units. Herein, under the guideline of synergistically molecular attractor-repulsor theory (SMART), we design four models of terfluorenes with the possibility of inducing β-conformation in the terfluorene 2,2′-(spiro[fluorene-9,9′-xanthene]-2,7-diyl) bis(9-(4-(octyloxy)phenyl)-fluoren-9-ol) (2O8-DPFOH-SFX) by manipulating the cooperative effects of steric hindrance, hydrogen bonding (HB) and van der Waals (vdW) forces after thermal annealing. For terfluorene 2O8-DPFOH-SFX, the two isomers, raceme and mesomer, with two side chains residing on the two sides and on the same side of the fluorene backbone, respectively, have different packing styles and hence different optical properties: only the raceme isomer could induce the formation of β-conformation. Due to the steric pairing effect of side chains on both sides and the cooperative interaction of the middle spiro[fluorene-9,9′-xanthene] (SFX) group, the racemes precisely interlace with each other and tend to adopt Δ-shaped stacking, which favors a planar π-conjugated structure for the raceme. This is rationalized by the larger content of planar conformations in the 2O8-DPFOH-SFX raceme, according to molecular dynamics (MD) simulations of the condensed phase. Thus, oligofluorenes with definite molecular structure can be considered as notable materials for gaining insight into the structure-property relationships for optical and electronics applications.

Friedel-crafts bottom-up synthesis of fluorene-based soluble luminescent organic nanogrids

A series of fluorene-based grid molecules (so-called Grid fluorenes) have been synthesized by means of shape-supported cyclization, starting from H-shaped precursors via the alternative Friedel-Crafts reactions of fluorenols and Suzuki cross-coupling reactions with key cyclization yields up to 26%. Fluorenol approaches and nanogrids open a door to soluble one-, two-, or three-dimensional nanoporous polymers as next-generation polymer mechano-semiconductors facing a new era of consciousness.