Rylenes

Due to their high chemical stability, their high tendency to physisorb on silica, and their high fluorescence quantum yields, rylene dyes (27) and (28) (Scheme 6) were chosen as tags for the catalysts.65 They were shown not to influence the actual catalytic process. Known zirconium... 

The attachment of a distinct number of fluorescent dyes at the periphery of a stiff three-dimensional nanoparticle is of fundamental interest to study interactions between single chromophores in close vicinity to each other. We chose as a dye one of the rylene series, perylenemonoimide, for the decoration of our polyphenylene dendrimers due to their outstanding properties. Rylene dyes show an exceptional chemical and photochemical stability and therefore are well suited for single molecule spectroscopy (SMS) [661. 

Figure 2 Planar 7r-systems of representative conjugated molecules and polymers, and cr-conjugated polysilanes. Polyenes, acenes and rylenes have variable length. Polydiacetylenes, polythiophenes, polyparaphenylenevinylenes and polysilanes give families with similar backbones and different nonconjugated side groups.

Hiickel model, which gives equal E(llBu). Since the transformation leads to expanded sites that contain two or three carbons, we expect smaller reduced Coulomb interactions in the PPP model. Standard parameters for expanded sites account for reduced in Table 4 for rylenes and places their E(21Ag) at higher energy,... 

When using a carbon electrode, the anodic oxidation of conjugated dienes (7) such as isoprene, pipe-rylene, cyclopentadiene and 1,3-cyclohexadiene in methanol or acetic acid mainly gives oxidative 1,4-addition products (8 equation 13). For example, 1,3-cyclohexadiene gives l,4-dimethoxycyclohex-2-ene (9) in 47% yield (equation 14). 1,3-Cyclooctadiene, in a similar experiment, yields a considerable amount of the allylically substituted product. 

Tetramethyl-diphenylamine, thick oil, bp — partially decomp 340—45° ptepd from asym o-rylene, bromo-Zn-ammonta Amm bromide heated in a aibe at 300-310° (Ref 2)... 

Casabond TX [Swan]. TM for a textile bonding agent. Bonds nylon, rayon, cotton, and te-rylene to natural and synthetic rubber. Also for rubber and metal bonding, PVC bonding and plasticized variety of synthetic textiles. 

Scheme 35 Phenylene dendrimer with different rylene subunits by Mullen and coworkers [96,97]...

Electrical and Magnetic Properties of Complexes of 2,2 , 6,6 -Tetramethyl-4,4 —Bipy-rylene (TMBP) and 2,2 ,6,6 -Tetramethyl-4,4 -Bithiopyrylene (TMBTP) with Hexa-cyanobenzene (HCNB) 521... 

Chem. Descrip. Modified, hydrory- and carboxy-functional acrylic polymer (50%) in solv. naphtha 150/180 / rylene Uses Ttcrylic for automotive clear coats (OEM)... 

Figure 13.3 Chemical structures of rylene diimides (perylene, n = 0 terrylene, n = 1 quaterrylene, n = 2 pentary-lene, n = 3 hexarylene, n = 4).

---