147274-72-4Relevant articles and documents
Investigation of different synthetic routes to and structure-property relationships of poly(m-phenylenevinylene-co-2,5-dioctyloxy-p-phenylenevinylene)
Drury, Anna,Maier, Stefanie,Ruether, Manuel,Blau, Werner J.
, p. 485 - 490 (2003)
The synthesis of poly(m-phenylenevinylene-co-2,5-dioctyloxy-p-phenylenevinylene) by Horner-Emmons and Wittig condensation polymerisation in three different solvents is described. The chemical and optical properties of the derivatives thus formed are analy
Heparin triggered dose dependent multi-color emission switching in water: a convenient protocol for heparinase I estimation in real-life biological fluids
Dey, Nilanjan,Samanta, Suman K.,Bhattacharya, Santanu
, p. 1486 - 1489 (2017)
Oligo(p-phenylenevinylene) based bis-pyridinium derivatives show ‘ratiometric’ detection of heparin in water. For the first time, we present a dose-dependent, multi-color emission switching in the presence of heparin. The reversible self-assembly of probe
Synthesis and nonlinear optical properties of rod-like luminescent materials containing Schiff-base and naphthalimide units
Zhang, Yingchao,Zhu, Weihong,Wang, Wenjun,Tian, He,Su, Jianhua,Wang, Wencheng
, p. 1294 - 1300 (2002)
Two series of novel rod-like compounds containing Schiff-base and naphthalimide units were synthesized. The liquid crystalline and amorphous phases of these compounds have been studied by differential scanning calorimetry (DSC), polarizing microscopy and
Two main chain polymeric metal complexes as dye sensitizers for dye-sensitized solar cells based on the coordination of the ligand containing 8-hydroxyquinoline and phenylethyl or fluorene units with Eu(III)
Xiao, Lifen,Liu, Yuan,Xiu, Qian,Zhang, Lirong,Guo, Lihui,Zhang, Hailiang,Zhong, Chaofan
, p. 1943 - 1951 (2010)
Two novel main chain polymeric metal complexes containing 8-hydroxyquinoline europium complexes and phenylethyl or fluorene units: 1,4-Dioctyloxy-2,5-bis[2-(8-hydroxyquinoline)-vinyl]-benzene Eu(III) (3) and 2,7-bis[2-(8-hydroxyquinoline)vinyl]-9,9'-diocthylfluorene Eu(III) (4) with donor-acceptor-π-conjugated structure (D-π-A) have been synthesized and investigated as dye sensitizers for dye-sensitized solar cells dyes (DSSCs). They have been determined and studied by FT-IR, TGA, DSC, GPC, Elemental analysis, UV-vis absorption spectroscopy, photoluminescence spectroscopy, cyclic voltammetry, and application in dyesensitized solar cells (DSSCs) as dye sensitizers. On the basis of optimized dye and molecular structure, they have shown solar-to-electricity conversion efficiency 2.25% for 3 (Jsc = 4.77 mA cm- 2, Voc = 630 mV, FF = 0.75) and 3.04% for 4 (Jsc = 6.33 mA cm -2, Voc = 640 mV, FF = 0.75), under the illumination of AM1.5G, 100 mW/cm2. The IPCE of 3 and 4 are 30% and 46% at 400 nm, respectively. Besides, they showed good stabilities with thermal decomposition temperatures at 280 °C and 225 °C, respectively, which are suitable for DSSCs.
Stereoretentive Ring-Opening Metathesis Polymerization to Access All- cis Poly(p-phenylenevinylene)s with Living Characteristics
Hsu, Ting-Wei,Kim, Cheoljae,Michaudel, Quentin
supporting information, p. 11983 - 11987 (2020/08/06)
Poly(p-phenylenevinylene)s (PPVs), a staple of the conductive polymer family, consist of alternating alkene and phenyl groups in conjugation. The physical properties of this organic material are intimately linked to the cis/trans configuration of the alkene groups. While many synthetic methods afford PPVs with all-trans stereochemistry, very few deliver the all-cis congeners. We report herein a synthesis of all-cis PPVs with living characteristics via stereoretentive ring-opening metathesis polymerization (ROMP). Exquisite catalyst control allows for the preparation of homopolymers or diblock copolymers with perfect stereoselectivity, narrow dispersities, and predictable average molar masses. All-cis PPVs can then serve as light-responsive polymers through clean photoisomerization of the stilbenoid units.
Isothermal and non-isothermal cold crystallization of tetrabenzofluorene (TBF) molecules
Boopathi,Sampath, Srinivasan,Narasimhaswamy
, p. 9500 - 9506 (2019/06/21)
Design and synthesis of tetrabenzo[a,c,g,i]fluorene (TBF) derivatives are carried out to investigate the isothermal and non-isothermal cold crystallization (CC) behavior by various spectroscopic and analytical techniques. The unprecedented CC exhibited by
Supramolecular Multiblock Copolymers Featuring Complex Secondary Structures
Elacqua, Elizabeth,Manning, Kylie B.,Lye, Diane S.,Pomarico, Scott K.,Morgia, Federica,Weck, Marcus
supporting information, p. 12240 - 12250 (2017/09/12)
This contribution introduces main-chain supramolecular ABC and ABB′A block copolymers sustained by orthogonal metal coordination and hydrogen bonding between telechelic polymers that feature distinct secondary structure motifs. Controlled polymerization t
Role of synergistic π-π Stacking and X-H...Cl (X = C, N, O) H-bonding interactions in gelation and gel phase crystallization
Bhattacharjee, Subham,Bhattacharya, Santanu
supporting information, p. 7019 - 7022 (2015/04/22)
The self-assembly of p-pyridyl-ended oligo-p-phenylenevinylenes (OPVs) in ethanol leads to the formation of either hollow or solid microrods. The corresponding protonated OPVs with n-butyl chains induce transparent gelation and also gel phase crystallization owing to various synergistic noncovalent interactions. The chloride ion-selective gelation, AIEE and stimuli responsiveness of the gel are also observed. This journal is
Direct evidence for secondary interactions in planar and nonplanar aromatic π-conjugates and their photophysical characteristics in solid-state assemblies
Goel, Mahima,Narasimha, Karnati,Jayakannan, Manickam
, p. 5102 - 5112 (2015/04/27)
Direct evidence for non-covalent secondary interactions in planar and nonplanar aromatic π-conjugates and their solid-state assemblies is established. A series of horizontally, vertically, and radially expanded oligo(phenylenevinylene)s (H-OPVs, V-OPVs, and R-OPVs, respectively) were designed with a fixed π-core and variable alkyl chain lengths on the periphery. Single-crystal structures of the OPVs were resolved to trace the secondary interactions that direct the solid-state self-organization and molecular packing of the chromophores. The H-OPVs were found to be planar, and they did not show any secondary interactions in the crystal lattices. The V-OPVs and R-OPVs were found to be nonplanar and to exhibit multiple CH/π hydrogen-bonding interactions among aryl hydrogen donors and acceptors. The enthalpies of the melting and crystallization transitions revealed that the planar H-OPVs are highly crystalline compared with the nonplanar R-OPVs and V-OPVs. Polarized light microscopy studies revealed the formation of one-dimensional nematic mesophases in H-OPVs. The absolute solid-state photoluminescence quantum yields (PLQYs) of the OPVs were determined using an integrating sphere setup. The highly packed H-OPVs showed low PLQYs compared with those of the weakly packed V-OPVs and R-OPVs. Time-resolved fluorescence decay measurements revealed that the excited-state decay dynamics of highly packed H-OPVs was much faster with respect to their low PLQYs. The decay profiles were found to be relatively slow (with higher life time (τ)) in the V-OPVs and R-OPVs. A field-effect transistor (FET) device was constructed for an OPV sample that showed a hole carrier mobility in the range of 10-5 cm2 V-1 s-1. The present investigation thus provides a new opportunity to trace the role of secondary interactions on π-conjugated mesophase self-assemblies and their solid-state emission and FET devices, more specifically based on OPV chromophores.
Remarkable regioisomer control in the hydrogel formation from a two-component mixture of pyridine-end oligo(p-phenylenevinylene)s and N-decanoyl-l-alanine
Bhattacharjee, Subham,Datta, Sougata,Bhattacharya, Santanu
supporting information, p. 16672 - 16681 (2014/01/06)
N-Decanoyl-L-alanine (DA) was mixed with either colorless 4,4′-bipyridine (BP) or various derivatives such as chromogenic oligo(p-phenylenevinylene) (OPV) functionalized with isomeric pyridine termini in specific molar ratios. This mixtures form salt-type gels in a water/ethanol (2:1, v/v) mixture. The gelation properties of these two-component mixtures could be modulated by variation of the position of the "N" atom of the end pyridyl groups in OPVs. The presence of acid-base interactions in the self-assembly of these two-component systems leading to gelation was probed in detail by using stoichiometry-dependent UV/Vis and FTIR spectroscopy. Furthermore, temperature-dependent UV/Vis and fluorescence spectroscopy clearly demonstrated a J-type aggregation mode of these gelator molecules during the sol-to-gel transition process. Morphological features and the arrangement of the molecules in the gels were examined by using scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction (XRD) techniques. Calculation of the length of each molecular system by energy minimization in its extended conformation and comparison with the XRD patterns revealed that this class of gelator molecules adopts lamellar organizations. Rheological properties of these two-component systems provided clear evidence that the flow behavior could be modulated by varying the acid/amine ratio. Polarized optical microscopy (POM), differential scanning calorimetry (DSC), and XRD results revealed that the solid-phase behavior of such two-component mixtures (acid/base=2:1) varied significantly upon changing the proton-acceptor part from BP to OPV. Interestingly, the XRD pattern of these acid/base mixtures after annealing at their associated isotropic temperature was significantly different from that of their xerogels.
