Month: October 2022

Walesa-Chorab, Monika; Muras, Kacper; Filiatrault, Heather L.; Skene, W. G. published an article in 2022. The article was titled 《Suitability of alkyne donor-π-donor-π-donor scaffolds for electrofluorochromic and electrochromic use》, and you may find the article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices.Recommanded Product: 2,5-Dibromothiophene The information in the text is summarized as follows:

A series of electroactive materials consisting of an aromatic core that was conjugated with two alkynes and flanked with two tri-Ph amines was investigated as electrochromes and electrofluorochromes. The yellow colored conjugated donor-π-donor-π-donor (D-π-D-π-D) alkynes could be electrochem. oxidized because of the terminal triphenylamine amines. The oxidation potential varied by 170 mV contingent on the central aromatic core (thiophene and EDOT) and whether the electroactive group was either unsubstituted or substituted with methyls in the 4,4′-positions. The emission of the chromophores was also contingent on the solvent and it spanned upwards of 90 nm. The emission yield was consistent (ca. 40%) and it was insensitive to the type of aromatic core, the triphenylamine substitution, and the solvent. The collective visible color and the electroactivity of the D-π-D-π-D compounds were ideal properties for electrochromic applications. The compounds underwent reversible color change from yellow to blue with the applied potential. The electrochromic devices fabricated from the D-π-D-π-D alkynes could be operated upwards of 15 h and operating devices that were flexible could also be prepared The intrinsic fluorescence of the D-π-D-π-D compounds could be reversibly turned-off with the applied potential, which enables them to be used in operating electrofluorochromic devices. Although the alkyne framework was robust for electrochromic use, it could react with tetracyanoethylene, leading to octanitrile substituted D-π-A-π-D-π-A-π-D chromophores that were red in color. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Recommanded Product: 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Recommanded Product: 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Extrinsic vs. intrinsic luminescence and their interplay with spin crossover in 3D Hofmann-type coordination polymers》 was written by Meneses-Sanchez, Manuel; Pineiro-Lopez, Lucia; Delgado, Teresa; Bartual-Murgui, Carlos; Munoz, M. Carmen; Chakraborty, Pradip; Real, Jose Antonio. Reference of 9,10-Dibromoanthracene And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2020. The article conveys some information:

The research of new multifunctional materials, as those undergoing spin crossover (SCO) and luminescent properties, is extremely important in the development of further optical and electronic switching devices. As a new step towards this ambitious aim, the coupling of SCO and fluorescence is presented here following two main strategies: whether the fluorescent agent is integrated as a part of the main structure of a 3D SCO coordination polymer {FeII(bpan)[MI(CN)2]2} (bpan = bis(4-pyridyl)anthracene, MI = Ag (FebpanAg), Au (FebpanAu)) or is a guest mol. inserted within the cavities of the 3D switchable framework {FeII(bpb)[MI(CN)2]2}·pyrene (bpb = bis(4-pyridyl)butadiyne, MI = Ag (FebpbAg·Pyr), Au (FebpbAu·Pyr)). The magnetic, calorimetric, structural, UV-visible absorption and fluorescent characterizations were performed confirming the occurrence of a SCO-fluorescence interplay in the studied compounds Moreover, the relevance of the intrinsic or extrinsic nature of the luminescence on the efficiency of the interplay is discussed on the basis of the available information. The results came from multiple reactions, including the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Reference of 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Reference of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nino, Patricia; Cabaa, Marta; Aguilar, Nuria; Terricabras, Emma; Albericio, Fernando; Fernandez, Joan-Carles published an article in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry. The title of the article was 《Efficient three-component synthesis of diversely substituted tetrahydro-1H-cyclopenta[c]quinolines》.Name: 4-Bromo-2-ethylbenzaldehyde The author mentioned the following in the article:

The synthesis of highly functionalized substituted tetrahydro-1H-cyclopenta[c]quinoline and its reduced derivatives hexahydro-1H-cyclopenta[c]quinolines via Povarov reaction in high diastereoselectivity and high to moderate yields is described. In addition, the relative stereochem. of the α-substituent to the tetrahydroquinoline nitrogen, as well as the regioselectivity of reaction, is shown to depend upon subtle substituent effects on the aldehyde and aniline precursors. In most cases, a preference for the formation of endo diastereomeric adducts is observed but for reactions with ortho-substituted aldehydes, the formation of exo adducts is also observed The exo-diastereoselectivity is found to be higher when the bulky size of this ortho group increases. Preparation of ortho and diortho-substituted aromatic aldehyde precursors of the Povarov reaction is also reported. In the experiment, the researchers used many compounds, for example, 4-Bromo-2-ethylbenzaldehyde(cas: 1114808-89-7Name: 4-Bromo-2-ethylbenzaldehyde)

4-Bromo-2-ethylbenzaldehyde(cas: 1114808-89-7) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Name: 4-Bromo-2-ethylbenzaldehyde Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Reference of 4,7-Bis(4-bromophenyl)-1,10-phenanthrolineOn May 31, 1985, Alford, Peter C.; Cook, Michael J.; Lewis, Anthony P.; McAuliffe, Glenn S. G.; Skarda, Vladimir; Thomson, Andrew J.; Glasper, John L.; Robbins, David J. published an article in Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999). The article was 《Luminescent metal complexes. Part 5. Luminescence properties of ring-substituted 1,10-phenanthroline tris-complexes of ruthenium(II)》. The article mentions the following:

The absorption characteristics, emission spectra, luminescent quantum yields, and lifetimes are reported for 24 Ru(II) tris-1,10-phenanthroline complexes in EtOH-MeOH solution Quantum yields were 0.019-0.403, the highest values being recorded for complexes substituted at the 4,7-sites with aryl groups. Incorporation of these derivatives into PVC film raised the quantum yields to 0.40-0.75. In the part of experimental materials, we found many familiar compounds, such as 4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9Reference of 4,7-Bis(4-bromophenyl)-1,10-phenanthroline)

4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Reference of 4,7-Bis(4-bromophenyl)-1,10-phenanthroline Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary