Electroluminescent Poly(quinoline)s and Metalloquinolates

Kimyonok, Alpay; Wang, Xian Yong; Weck, Marcus

doi:10.1080/15321790500471210

Cited by 80 publications

(69 citation statements)

References 130 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Althought, the synthesis and characterization of quinolone copolymers, blends and composites are studied widely, the synthesis and the properties of quinolone homopolymers have been less investigated (2,4). Ragimov and co-workers studied the oxidative polymerization of 8-hydroxy quinoline in alkaline medium in the presence of air oxygen.…”

Section: Introductionmentioning

confidence: 99%

“…Quinolines and poly(quinoline)s have been reported to have high electron mobilities, good thermal and oxidative stabilities, and high photoluminescence efficiencies. Furthermore, they possess good film forming properties, which is crucial for their use in optical purpose (2). Amino quinoline monomers have been also reported to have wide applicability towards pharmacological, antihypertensive, antimalarial, antibacterial and antioxidant agents (3).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

2017

View full text Add to dashboard Cite

The compound 5-aminoquinoline (AQ) was treated with horseradish peroxidase (HRP) and H2O2 in a reaction medium containing a dioxane:phosphate buffer mixture (70:30). Products (OAQ) with a degree of polymerization ranging from 4 to 12 were obtained. 1H NMR, FTIR, UV–vis, SEM, TG–DTA, DSC, XRD analysis, and conductivity measurements were conducted for characterization of OAQ. Compared with a monomer, OAQ showed higher thermal stability. After heating to 1000 °C, 46% of the initial weight of the OAQ remained. The antioxidant efficiencies of the monomer and oligomer were evaluated by the typical spectrophotometric method such as the bleaching of 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals. OAQ showed improved DPPH activity compared with the AQ monomer.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

2017

View full text Add to dashboard Cite

show abstract

“…Third, the reported polybenzoquinolines constitute an ovel class of precursor polymers for N = 7a rmchair GNRs (Figure 1), which have been prepared exclusively from polyanthracenes to date. [11][12][13][14][15][16][17][18][19] Due to the propensity of some anthracene derivatives to oxidation and undesirable photochemistry, [52,53] our precursors may prove advantageous for the preparation of diverse libraries of GNRs with designer electronic properties.F inally,wenote that our polybenzoquinolines could find an umber of alternative applications; indeed, quinoline derivatives are privileged scaffolds in medicinal chemistry, [54,55] ubiquitous ligands in inorganic chemistry, [56,57] and promising materials for organic electronic devices. [58][59][60][61] Consequently,t he presented synthetic methodology may prove generally valuable across ab road swath of chemical and physical disciplines.…”

mentioning

confidence: 97%

Synthesis of Polybenzoquinolines as Precursors for Nitrogen‐Doped Graphene Nanoribbons

et al. 2015

View full text Add to dashboard Cite

Graphene nanoribbons (GNRs) represent promising materials for the next generation of nanoscale electronics. However,d espite substantial progress towards the bottom-up synthesis of chemically and structurally well-defined all-carbon GNRs,s trategies for the preparation of their nitrogen-doped analogs remain at an ascent stage.T his scarce literature precedent is surprising given the established use of substitutional doping for tuning the properties of electronic materials. Herein, we report the synthesis of apreviously unknown class of polybenzoquinoline-based materials,w hichh ave potential as GNR precursors.Our scalable and facile approach employs few synthetic steps,inexpensive commercial starting materials, and straightforwardr eaction conditions.M oreover,d ue to the importance of quinoline derivatives for av ariety of applications,t he reported findings may hold implications across ad iverse range of chemical and physical disciplines.Graphene nanoribbons (GNRs), which are narrow strips of graphene featuring aq uantum confinement-induced bandgap,c onstitute ap romising class of materials for the next generation of semiconductor devices.[1-10] Theelectronic properties of GNRs are exquisitely sensitive to their width, heteroatom content, and edge character. [3][4][5] Thus,m uch research effort has been devoted to the preparation of GNRs that are structurally and chemically defined at the atomic level. [6][7][8][9][10] Although traditional top-down lithographic approaches have exhibited only limited success in this regard, [6][7][8][9][10] more recent studies have demonstrated the bottom-up preparation of pristine GNRs via the surfaceassisted [11][12][13][14][15][16][17][18][19][20][21][22] or solution-phase [23][24][25][26][27][28][29][30][31][32] synthesis of nanoribbon precursor polymers,followed by their cyclodehydrogenation. To date,these bottom-up strategies have primarily focused on all-carbon systems,w ith only al imited number of studies describing the preparation of nitrogen-containing GNR frameworks. [20-22, 31, 32] Given the immense potential of substitutional nitrogen doping for tailoring the propertieso f GNRs,the sparse literature precedent is surprising and likely arises from the challenges associated with the incorporation of heteroatoms at arbitrary locations in graphitic materials. [33,34] Herein, we describe the modular synthesis of polybenzoquinolines,which constitute ageneric class of GNR precursor polymers,and, to the best of our knowledge,have never been previously reported. We first develop general aza-DielsAlder reaction conditions for the synthesis of as eries of benzoquinoline model compounds.Subsequently,weprepare an AB-type bifunctional monomer and use the conditions validated for the model compounds to synthesize acongested polybenzoquinoline via aD iels-Alder-type polymerization reaction. [35][36][37] We in turn demonstrate the scope and modularity of our methodology by preparing polybenzoquinolines of various sizes that feature different peripheral substituents. Overa...

show abstract

“…Small molecules such as metal based quinoline derivatives like Tris-(8-hydroxyquinoline) aluminum (Alq 3 ) have been shown to have high efficiency as well as stability in organic light emitting devices, OLEDs [1]. Potential of Zinc(II) bis(8-hydroxyquinoline) (Znq 2 ) has been amply recognized in the literature [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Investigations of Different Phases Responsible for Changes in Optical Properties of Organic Semiconducting Device Material Thin Films

Shukla

Maitra

2013

Journal of Materials

View full text Add to dashboard Cite

The environment sensitivity of organic semiconductors may change their molecular structure and hence optical properties. Exploiting this concept, experiments were performed on a green light emitting material bis(8-hydroxy quinoline)Zinc, (Znq 2 ) used in organic light emitting diodes (OLEDs). Thin films were deposited at varying deposition parameters, and their properties were compared. We investigated that as deposited films have a significant component of Znq 2 tetramer out of two known forms, that is, dihydrate and anhydrous tetramer (Znq 2 ) 4 , the films deposited at lower deposition rates have higher anhydrous content. The degradation of thin film is shown, that changes the optical properties of film from green emission to blue which may be due to water adsorption and crystallization.

show abstract

Electroluminescent Poly(quinoline)s and Metalloquinolates

Cited by 80 publications

References 130 publications

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

Enzymatic synthesis of 5-amino quinoline oligomers and evaluation of their free radical scavenging activity

Synthesis of Polybenzoquinolines as Precursors for Nitrogen‐Doped Graphene Nanoribbons

Investigations of Different Phases Responsible for Changes in Optical Properties of Organic Semiconducting Device Material Thin Films

Contact Info

Product

Resources

About