197969-58-7

Basic information

• Product Name: 2,7-Dibromo-9,9-diethylfluorene
• Synonyms: 2,7-Dibromo-9,9-diethylfluorene;9H-Fluorene,2,7-dibromo-9,9-diethyl-;2,7-Dibromo-9,9-diethyl-9H-fluorene;9,9-Diethyl-2,7-dibromofluorene;2,7-Dibromo-9,9-diet
• CAS NO: 197969-58-7
• Molecular Formula: C₁₇H₁₆Br₂
• Molecular Weight: 380.12
• Product Categories: Electronic Chemicals
• Mol File: 197969-58-7.mol
• Article Data: 36

Chemical Properties

• Boiling Point: 426.6°C at 760 mmHg
• Flash Point: 247.8°C
• Appearance: /
• Density: 1.494
• Vapor Pressure: 4.33E-07mmHg at 25°C
• Refractive Index: 1.606
• CAS DataBase Reference: 2,7-Dibromo-9,9-diethylfluorene(CAS DataBase Reference)
• NIST Chemistry Reference: 2,7-Dibromo-9,9-diethylfluorene(197969-58-7)
• EPA Substance Registry System: 2,7-Dibromo-9,9-diethylfluorene(197969-58-7)

Safety Data

• Hazardous Substances Data: 197969-58-7(Hazardous Substances Data)

Usage

General Description

2,7-Dibromo-9,9-diethylfluorene is a chemical compound composed of two bromine atoms and two ethyl groups attached to a fluorene molecule. It is a solid, crystalline compound that is insoluble in water and has a high melting point. 2,7-Dibromo-9,9-diethylfluorene is primarily used in research and as an intermediate in the synthesis of other organic compounds. Its bromine atoms make it useful in various chemical reactions as a halogenating agent, and its structure allows it to be involved in various organic synthesis processes. Additionally, its bulky ethyl groups provide steric hindrance, making it useful in certain catalytic reactions.

InChI:InChI=1/C17H16Br2/c1-3-17(4-2)15-9-11(18)5-7-13(15)14-8-6-12(19)10-16(14)17/h5-10H,3-4H2,1-2H3

Upstream product

• 74-96-4 ethyl bromide 
• 16433-88-8 2,7-dibromo-9H-fluorene 
• 86-73-7 9H-fluorene 
• 106-94-5 propyl bromide 
• 75-03-6 ethyl iodide 
• 2294-79-3 9,9-diethyl-9H-fluorene 

Downstream Products

• 778641-66-0 9,9-diethyl-2,7-bis-(4-methoxy-phenyl)-9H-fluorene 
• 1245642-78-7 2-bromo-7-(4-(diphenylamino)phenyl)-9,9-diethylfluorene 
• 1245649-43-7 5-(2-(4-(diphenylamino)phenyl)-9,9-diethylfluorene-7-yl)-3-hexylthiophene-2-carbaldehyde 
• 1245652-56-5 3-(5-(2-(4-(diphenylamino)phenyl)-9,9-diethylfluorene-7-yl)-3-hexylthiophene-2-yl)-2-cyanoacrylic acid 
• 701971-75-7 N,N-di(3-hydroxyphenyl)-7-(benzothiazol-2-yl)-9,9-diethylfluoren-2-amine 
• 701971-73-5 N,N-di(3-methoxyphenyl)-7-(benzothiazol-2-yl)-9,9-diethylfluoren-2-amine 
• 1190833-67-0 7-(benzo[d]thiazol-2-yl)-9,9-diethyl-N,N-bis(3-(4-nitrophenoxy)phenyl)-9H-fluoren-2-amine 
• 1190833-68-1 N,N-bis(3-(4-aminophenoxy)phenyl)-7-(benzo[d]thiazol-2-yl)-9,9-diethyl-9H-fluoren-2-amine 
• 1370605-04-1 N,N-di(4-hydroxyphenyl)-7-(benzothiazol-2-yl)-9,9-diethyl-fluoren-2-amine 
• 1370605-03-0 N,N-di(4-methoxyphenyl)-7-(benzothiazol-2-yl)-9,9-diethyl-fluoren-2-yl-amine 
• 1370605-05-2 N,N-Di[4-(4-nitrophenoxy)phenyl]-7-(benzothiazol-2-yl)-9,9-diethyl-fluoren-2-amine 
• 1370605-06-3 N,N-Di[4-(4-aminophenoxy)phenyl]-7-(benzothiazol-2-yl)-9,9-diethyl-fluoren-2-amine 
• 1372550-62-3 9,9-diethyl-N₂,N₇-diphenyl-N₂,N₇-di(pyren-1-yl)-9H-fluorene-2,7-diamine 
• 1372550-65-6 4-((9,9-diethyl-7-(phenyl(pyren-1-yl)amino)-9 H-fluoren-2-yl)(pyren-1-yl)amino)benzaldehyde 

Relevant articles and documents

Electroluminescent properties of novel fluorene derivatives with aromatic amine moieties

2,7-Bis[(4-diphenylamino)phenylvinylene]-9,9-diethylfluorene(BDPDF, 1) and 2,7-bis[(9-ethyl-3-carbazolylvinylene)-9,9-diethylfluorene(BECDF, 2) have been synthesized and characterized. To evaluate electroluminescent performance, compound 1 and 2 were used

Fluorenes substituted with fluorophenyl, difluorophenyl or trifluorophenyl fragments as materials for organic light emitting diodes

9,9-Diethylfluorenes substituted with two fluorophenyl, difluorophenyl or trifluorophenyl fragments were synthesized by the multi-step synthetic rout. The materials were characterized by 1H NMR spectroscopy, mass spectrometry, differential scanning calorimetry and thermogravimetric analyses. Some of the electro-active derivatives could form thin amorphous films and were tested as solution processed hole transporting layers in organic light- emitting diodes with Alq3 as the emitter and electron transporting material. Some of the electroluminescent devices demonstrated turn voltage of 5.5?V, a maximal photometric efficiency of about 1.0 cd/A and maximum brightness exceeding 960 cd/m2 .

Synthesis, characterization and photophysical-theoretical analysis of compounds A-π-D. 1. Effect of alkyl-phenyl substituted amines in photophysical properties

The study of new dipolar A-π-D molecules, which have an acceptor (A) and donor (D) charge joined by a conjugate bridge, have been an attention focus in the recent years due their different properties. In the current work, a molecular system has been modified in order to compare the effect on properties, such as quantum yield. Thus, two series were generated (alkyl- and alkoxy-substituted) to determine if molecules with tertiary asymmetric amines change their optical properties and whether quantum yield is affected. The different products have been characterized by several techniques such as UV–Vis spectrophotometry, elemental analysis, NMR, FT-IR, mass spectroscopy and fluorescence spectroscopy. Furthermore, their behavior in eight organic solvents, dichloromethane, tetrahydrofuran, ethyl acetate, 1,4-dioxane, acetone, acetonitrile, dimethylformamide and dimethylsulfoxide were experimentally and theoretically studied. The quantum yields were higher for the alkyl-substituted series. Theoretically, the dihedral angles formed between the tertiary amine and carbonyl group moieties have a correlation with quantum yield values, helping to explain why they are higher in non-polar solvents. Consequently, the maximum quantum yield was obtained with (E)-2-cyano-3-(5-((E)-2-(9,9-diethyl-7-(methyl(phenyl)amino)-9H-fluoren-2-yl) vinyl)thiophen-2-yl)acrylic acid (M8-1) in 1,4-dioxane, reaching 98.8%.

[4]Cyclofluorene: Unexpected Influence of Alkyl Chain Length

Presented here is the study of a new example of [4]cyclofluorene, with ethyl chains on the bridgeheads. Its molecular structure was established by solution NMR spectroscopy and single-crystal X-ray diffraction. Three successive oxidation processes and one reversible reduction were observed through cyclic voltammetry. The optical properties were characterized both in solution and thin film by UV/visible spectroscopy as well as stationary and time-resolved fluorescence. It was found that this [4]cyclofluorene displays different characteristics compared with the other [4]cyclofluorenes substituted by methyl or propyl chains: a simple modification of the chain length induces a non-negligible effect on the emission properties, which must be linked to the specific arrangement of the fluorene units. Furthermore, single-crystal X-ray diffraction reveals the formation of a pseudo-tubular solid-state arrangement of fully symmetrical ring structures, which was not observed for the other members of the [4]cyclofluorenes family. This finding could open the way to modulation of properties of cyclofluorenes through alkyl chain engineering.

PIPERAZINE-CONTAINING TWO-PHOTON ABSORBING COMPOUNDS

A two-photon absorbing (TPA) compound is provided along with a method of making same. The TPA compound has a general structural formula: where R1 and R2 are independently selected from the group consisting of linear or branched alkyl chains having a general formula CnH2n+1, n ranges from about 6 to about 20, and ethoxylated alkyls having a general formula R3(OCH2CH2)mOCH2CH2—, where R3 is a C1 to C4 alkyl group, and where m ranges from 0 to about 3; and where Y is selected from the group consisting of H, OH, and alkoxyl groups.

Fluorene bridged cyclic N-heterocyclic carbene silver complex as well as preparation method and application thereof

The invention discloses a cyclic N-heterocyclic carbene silver complex as well as a preparation method and application thereof. The preparation method comprises the steps of enabling fluorine, used asa raw material, to react with liquid bromine, and enabling the obtained product (W) to react with bromoethane so as to obtain a product (X); enabling the product (X) to react with imidazole so as toobtain a compound (Y), enabling the compound (Y) to further react with benzyl bromide so as to obtain a product (Z), and enabling the product (Z) to react with silver oxide so as to obtain the cyclicN-heterocyclic carbene silver complex (1). The cyclic N-heterocyclic carbene silver complex (1) is used as the main body, different types of nitrates are taken as the objects, and the main body and objects are separately dissolved in an organic solvent at the temperature of 25 DEG C or below; the main body solution is separately mixed with the different object solutions under a certain concentration, and the fluorescence spectrums of the mixed solutions are measured, so that the objects which can be identified by the main body can be found; titration is carried out on the main body by using the objects which can be identified by the main body and have the different concentrations, so that the fluorescence spectrum is determined. The cyclic N-heterocyclic carbene silver complex prepared bythe method has the advantages of being simple to prepare and obvious in fluorescent and light-sensitive effects, and can be used for making a fluorescent molecular recognition system, thus being expected to be applied to the field of fluorescent chemistry.