- C3-Symmetric Positional Isomers of BODIPY Substituted Triazines: Synthesis and Excited State Properties
-
A series of meso-O-aryl functionalized BODIPY trimers positioned along the C3-symmetric axis of triazine ring have newly been synthesized to probe the ground and excited state intramolecular type interactions between the BODIPY entities within the trimer. The developed synthetic strategy resulted in BODIPY trimers in good yields. The electron rich, meso-O-aryl functionalized BODIPYs revealed larger HOMO-LUMO gap and higher Stokes shift and fluorescence lifetimes compared to the traditional BODIPY derivatives having an aryl group attached at the meso position. The optical absorption, steady-state fluorescence, and electrochemical studies revealed weak, if any, intramolecular type interactions among the BODIPY entities within the trimer and the central triazine unit to be both photo- and redox-salient. The possibility of singlet-singlet energy migration among the BODIPY entities was investigated using time-resolved emission and femtosecond transient absorption studies. Excitation of a BODIPY entity in the trimers led to successful formation of 1BODIPY?, which populated the 3BODIPY? via intersystem crossing. Among the three trimers, although very weak, only trimer 8 revealed excitation transfer to some extent. The present findings suggest that the meso-O-aryl functionalized BODIPYs due to their superior fluorescence properties are better probes to build light energy harvesting supramolecular oligomeric systems and for other applications such as sensing and imaging.
- Maragani, Ramesh,Thomas, Michael B.,Misra, Rajneesh,D'Souza, Francis
-
-
Read Online
- From achiral to helical bilayer self-assemblies of a 1,3,5-triazine-2,4,6-triphenol-grafted polyanionic cluster: Countercation and solvent modulation
-
A triazine derivative with two short alkyl chains was covalently grafted onto a disk-like polyoxometalate cluster on both sides, and an amphiphilic polyanionic cluster was obtained. The linear cluster complex showed phase separation in polar and non-polar
- Liu, Danjinkun,Zhang, Guohua,Gao, Bo,Li, Bao,Wu, Lixin
-
-
Read Online
- A Shape-Persistent Cryptand for Capturing Polycyclic Aromatic Hydrocarbons
-
A shape-persistent cryptand 1, containing two face-to-face oriented electron-deficient 2,4,6-triphenyl-1,3,5-triazine units separated by approximately 7 ?, and bridged by two rigid 1,8-naphthyridine linkers and a pentaethylene oxide loop, is created for c
- Zhang, Rui-Feng,Hu, Wen-Jing,Liu, Yahu A.,Zhao, Xiao-Li,Li, Jiu-Sheng,Jiang, Biao,Wen, Ke
-
-
Read Online
- A SUNSCREEN FORMULATION
-
Provided herein is synthesis of new classes of sunscreen agents, the usage of such sunscreen agents to prepare sunscreen formulation materials aiming at reduction of sunscreen agents' skin penetration. The whole purpose is to improve the biosafety of sunscreen products via novel sunscreen materials and formulation technology to reduce or to eliminate skin penetration of sunscreen agents. The technology can be applied to cosmetics, pharmaceutical or insects' repellent products.
- -
-
Paragraph 00106-00110
(2021/03/19)
-
- Design and synthesis of C3-symmetric molecules containing oxepine and benzofuran moieties via Metathesis
-
We report a new synthetic strategy to C3-symmetric star-shaped phenyl and triazine central cores bearing oxepine and benzofuran ring systems. In this regard, we have explored the application of metathetic strategy to construct C3-sym
- Gupta, Naveen Kumar,Kotha, Sambasivarao,Solanke, Balaji. U.
-
-
- Triazine-cored dendritic molecules containing multiple o-carborane clusters
-
A series of C3-symmetricaltriazine-cored small dendritic molecules containing three to nine peripheral o-carborane clusters were synthesized through Cu(I)-catalyzedazide–alkyne cycloaddition reactions. The newly synthesized molecules containing multiple o-carborane moieties were characterized using nuclear magnetic resonance and matrix-assisted laser desorption/ionization-time of flight mass spectral analysis. The biological evaluation of these three to nine cage dendrimers was performed using breast cancer cells (Michigan Cancer Foundation 7). All these dendritic compounds showed cytotoxicity toward breast cancer cells, and the toxicity increased as the number of peripheral o-carboranes increased. The 9-cage molecule showed the highest cytotoxicity, and the half maximal inhibitory concentration (IC50) value was found to be 80.67 ng/ml. Its cytotoxicity was significantly higher than the common chemotherapy agent cisplatin. As expected, the boron-richo-carborane-appended molecules showed high thermal stability. The thermal stability increased as the number of peripheral o-carborane moieties increased.
- Jena, Bibhuti Bhusan,Jena, Soumya Ranjan,Swain, Biswa Ranjan,Mahanta, Chandra Sekhara,Samanta, Luna,Dash, Barada P.,Satapathy, Rashmirekha
-
-
- COMPOSITION FOR FILM FORMATION, FILM, RESIST UNDERLAYER FILM-FORMING METHOD, PRODUCTION METHOD OF PATTERNED SUBSTRATE, AND COMPOUND
-
The composition for film formation includes a compound including a group of the formula (1) and a solvent. In the formula (1), R1 to R4 each independently represent a hydrogen atom, a monovalent organic group having 1 to 20 carbon at
- -
-
Paragraph 0199
(2019/04/14)
-
- Interaction of carborane-appended trimer with bovine serum albumin: A spectroscopic investigation
-
The interaction of symmetrical triazine-cored carborane-appended trimer 5 with bovine serum albumin has been investigated using different spectroscopic methods. The intrinsic fluorescence of BSA was quenched by the carborane trimer 5 through the dynamic q
- Jena, Bibhuti Bhusan,Satish, Lakkoji,Mahanta, Chandra Sekhara,Swain, Biswa Ranjan,Sahoo, Harekrushna,Dash, Barada P.,Satapathy, Rashmirekha
-
-
- Compound as well as preparation method and application thereof
-
The invention provides a compound as well as a preparation method and an application thereof. The compound is shown by the general formula (1), where X1, X2 and X3 are independently selected from formulas shown in the specification; and Y1 and Y2 are sele
- -
-
Paragraph 0071; 0072
(2018/07/30)
-
- Cofacial Organic Click Cage to Intercalate Polycyclic Aromatic Hydrocarbons
-
The synthesis of a 3-fold symmetric cofacial organic cage (COC) through Cu(I)-catalyzed azide-alkyne cycloaddition is reported. The COC can function as an efficient receptor for carcinogenic polycyclic aromatic hydrocarbons to intercalate them in its intrinsic cavity through donor-acceptor and π? π stacking interactions. The association constants (Ka) are in the range of 3.7 × 104 to 1.3 × 106 M-1. X-ray diffraction analysis authenticated that the polycyclic aromatic hydrocarbons (PAHs) are intercalated in the interior of the COC.
- Samanta, Jayanta,Natarajan, Ramalingam
-
supporting information
p. 3394 - 3397
(2016/07/26)
-
- s-Triazine-based functional monomers with thermocrosslinkable propargyl units: Synthesis and conversion to the heat-resistant polymers
-
Three s-triazine-based functional monomers with thermo-polymerizable propargyl-ether units were synthesized by a facile procedure. These monomers can be thermally cured to form the crosslinked networks, which showed 5-wt% loss temperature of up to 400?°C and the char yields of more than 50% at 1000?°C. Moreover, the crosslinked networks exhibited the coefficients of thermal expansion (CTE) of below 43?ppm?°C?1 varying from 30 to 300?°C and glass transition temperatures (Tg) of up to 290?°C, respectively. These monomers were also used to improve the thermostability of a commercial bismaleimide (4,4′-bismaleimidodiphenylmethane). The results indicated that blending the bismaleimide and the triazine monomers gave the new resins, which showed higher Tg and lower CTE than the bismaleimide, suggesting the triazine monomers can be considered as the modifiers for enhancement of the thermostability of the commercial bismaleimides.
- Zhou, Junfeng,Wang, Jiajia,Jin, Kaikai,Sun, Jing,Fang, Qiang
-
p. 301 - 307
(2016/09/28)
-
- Facile synthetic routes to phenylene and triazine core based dendritic cobaltabisdicarbollides
-
The synthesis and thermal properties of phenylene and triazine core based symmetrical macromolecules containing three to six cobaltabis(dicarbollide) clusters are reported. The zwitterionic oxonium derivative of cobaltabis(dicarbollide), [3,3′-Co(8-C4H8O 2-1,2-C2B9H10)(1′,2′- C2B9H11)], has been used for the synthetic transformations, and silicon tetrachloride and triflic acid were used as the cyclotrimerization reagents. Compounds containing multiple cobaltabis(dicarbollide) clusters are found to be extremely thermally stable, and only a 10-30% mass loss occurred up to 700 °C.
- Dash, Barada Prasanna,Satapathy, Rashmirekha,Maguire, John A.,Hosmane, Narayan S.
-
experimental part
p. 5230 - 5235
(2011/01/03)
-
- Synthesis of nano-sized C3-symmetric 2,4,6-triphenyl-l,3,5-s- triazine and 1,3,5triphenylbenzene derivatives via the trimerization followed by Suzuki-Miyaura cross-coupling or O-alkylation reactions and their biological evaluation
-
Various C3-symmetric 2,4,6-triphenyl-l,3-5-s-triazine and 1,3,5-triphenylbenzene derivatives have been prepared using cyclotrimerization, Suzuki-Miyaura cross-coupling and O-alkylation reactions as key steps. The biological activity of Oalkylat
- Kotha, Sambasivarao,Kashinath, Dhurke,Lopus, Manu,Panda, Dulal
-
scheme or table
p. 1766 - 1770
(2011/03/19)
-
- Synthesis of liquid crystalline materials based on 1,3,5-triphenylbenzene and 2,4,6-triphenyl-1,3,5-s-triazine
-
C3-symmetric alkyloxy/aryloxy polyether dendrimers have been synthesized from 1,3,5-triphenylbenzene and 2,4,6-triphenyl-1,3,5-s-triazine and their liquid crystalline properties have been studied. C3-symmetric derivatives with n-hexy
- Kotha, Sambasivarao,Kashinath, Dhurke,Kumar, Sandeep
-
p. 5419 - 5423
(2008/12/22)
-