28320-34-5

Usage

Uses

Used in Chemical Synthesis:
2-amino-7-bromo-9,9-dimethyl fluorene is used as a building block in the synthesis of organic compounds for various applications. Its unique structure and reactivity make it a valuable component in creating more complex molecules.
Used in Pharmaceutical Research:
In the pharmaceutical industry, 2-amino-7-bromo-9,9-dimethyl fluorene is used as an intermediate in the development of new drugs. Its potential applications in medicinal chemistry are being explored for the creation of novel therapeutic agents.
Used in Advanced Materials and Dyes:
2-amino-7-bromo-9,9-dimethyl fluorene is used as a component in the development of advanced materials and dyes due to its fluorescent properties. These properties make it suitable for applications in various industries, such as in the production of specialty dyes and materials with unique optical characteristics.
Used in Organic Synthesis Processes:
2-amino-7-bromo-9,9-dimethyl fluorene is used as an important intermediate in organic synthesis processes, where its reactivity and the presence of the bromine atom contribute to the formation of desired products in chemical reactions.

Upstream product

• 4569-45-3 9,9-dimethyl-9H-fluorene 
• 28320-32-3 2,7-dibromo-9,9-dimethyl-9H-fluorene 
• 28320-31-2 2-bromo-9,9-dimethyl-9H-fluorene 
• 605644-46-0 9,9-dimethyl-2-nitro-9H-indole 
• 28320-33-4 2-bromo-7-nitro-9,9-dimethyl-9H-fluorene 

Downstream Products

• 1208005-71-3 7-bromo-N,N-diethyl-9,9-dimethyl-9H-fluoren-2-amine 
• 28320-64-1 {7-[Bis-(4-dimethylamino-phenyl)-methoxy-methyl]-9,9-dimethyl-9H-fluoren-2-yl}-dimethyl-amine 
• 28320-65-2 (7-Dimethylamino-9,9-dimethyl-9H-fluoren-2-yl)-(4-dimethylamino-phenyl)-phenyl-methanol 

Relevant academic research and scientific papers

Toward two-photon absorbing dyes with unusually potentiated nonlinear fluorescence response

The combination of two two-photon-induced processes in a F?rster resonance energy transfer (FRET)-operated photochromic fluorene-dithienylethene dyad lays the foundation for the observation of a quartic dependence of the fluorescence signal on the excitat

Compound, application thereof and organic light-emitting device comprising compound

The present invention relates to a novel organic compound having a structure represented by the following formula (1): wherein one of A and B is represented by a formula Y1, and the other is represented by a formula Y2. When the compound is used as an electron transport layer material in an OLED device, excellent device performance and stability are shown. The invention also discloses an organic light-emitting device adopting the compound with the general formula.

Design, synthesis and properties of near-infrared molecular switches containing a fluorene ring

Three molecular switches containing a fluorene ring were designed and synthesized. The introduction of the amino group substituted fluorene ring resulted in the target molecular switches having some optical properties in the near-infrared region. It was demonstrated that the N-substituents on the fluorene rings and the switch units both had great influence on the molecular switch optical properties including the absorption maximum, absorption intensity and fluorescence quantum yield. The open-ring forms IA and IIA showed obvious solvatochromic behaviour. The closed-ring forms IIB and IIIB showed obvious hydrochromic behaviour in MeCN/water binary solvent systems and acidichromic behaviour in MeCN solution with high reversibility. Especially, the distinct off-on fluorescence signal in the near-infrared region using the stimuli of acid means that the designed compounds have great potential application value in the field of biological sensing.

Rational Design of Push–Pull Fluorene Dyes: Synthesis and Structure–Photophysics Relationship

Our work surveyed experimental and theoretical investigations to construct highly emissive D–π–A (D=donor, A=acceptor) fluorenes. The synthetic routes were optimised to be concise and gram-scalable. The molecular design was first rationalised by varying the electron-withdrawing group from an aldehyde, ketotriazole or succinyl to methylenemalonitrile or benzothiadiazole. The electron-donating group was next varied from aliphatic or aromatic amines to saturated cyclic amines ranging from aziridine to azepane. Spectroscopic studies correlated with TD-DFT calculations provided the optimised structures. The selected push–pull dyes exhibited visible absorptions, significant brightness, important solvatofluorochromism, mega-Stokes shifts (>250 nm) and dramatic shifts in emission to the near-infrared. The current library includes the comprehensive characterization of 16 prospective dyes for fluorescence applications. Among them, several fluorene derivatives bearing different conjugation anchors were tested for coupling and demonstrated to preserve the photophysical responses once further bound.

Design of donor-acceptor geometry for tuning excited-state polarization: Fluorescence solvatochromism of push-pull biphenyls with various torsional restrictions on their aryl-aryl bonds

In this work, push-pull biphenyl analogs (4-(N,N-dimethylamino)-4′-formylbiphenyl) with a modulated dihedral angle of the aryl-aryl bond, using a bridged structure or methyl groups, were synthesized. Photophysical measurements of the synthesized compounds revealed the effect of the torsion between N,N-dimethylaniline (donor) and benzaldehyde moieties (acceptor) on their solvatochromic properties. Our data showed that the sensitivity of the fluorescence maxima to solvent polarity gradually increases as the biphenyl chromophore was restricted to a twisted conformation. This finding indicates that changing the torsional restrictions on the donor-acceptor system can be a factor to take into account for the development of novel solvatochromic dyes.

Polarity-dependent photophysical properties of hemicyanine dyes and their application in 2-photon microscopy biological imaging

Two fluorescent hemicyanine type compounds, 1 and 2 have been developed for membrane staining, and their photophysical properties were investigated in various solvents. The demonstrated 2-photon-microscopy-biological-imaging application indicates the usefulness of 1 as a fluorescent probe.