Tape structure

Hentschel J, Krause E, Bomer HG (2006) Switch-peptides to trigger the peptide guided assembly of poly(ethylene oxide)-peptide conjugates into tape structures. J Am Chem Soc... 

Figure 5.51 (a) Polymeric tape structure of [Au(SC6H3N202) (PPh3)] and (b) sheet structure of [ Au(SC6H3N202) 2 X-PPh2(CH2)3PPh2 ] formed via N —H- hydrogen bonds. 

Homo-assembly of derivatives of the self-complementary recognition group 168 can only yield a linear ribbon or tape structure 179. This is indeed the case, as shown... 

Figure 8.57 Supramolecular synthons 8.44 and 8.45 formed to halometallate complexes along with the tape structure formed by 4,4 bipyridinium tetrachloroplatinate(II) via an Rf (4) hydrogen bonded...

Figure 21 (a) Hydrogen-bonded tape structure of cation in [Pd(dppp)(L)2](CF3S03)2-... 

The archetypal self-complementary supramolecular synthons are carboxylic acid dimers, which form i (8) rings (Fig. la). Extension from the discrete zerodimensional dimer into one-, two- and three-dimensional structures can be facilitated by the incorporation of more than one carboxylic acid group into a molecule. Hence simple dicarboxylic acids such as terephthalic acid and isophthalic acid typically exhibit tape structures whereas tricarboxylic acids such as trimesic acid form sheet structures (Fig. 2). 

Fig. 2 a The linear tape structure of terephthalic acid, b The zigzag tape structure of isophthalic acid, c The chicken wire sheet structure of trimesic acid [29]... 

Fig. 8 Common hydrogen bonding patterns observed for amides a the tape structure formed by primary amides involving i (8) and C(4) motifs b chains formed by non-cyclic secondary amides c the dimer formed by cyclic amides [62]...

Bis(amidinium) dicarboxylates form tape structures in which each cation possesses two DD faces, and each anion two AA faces (Fig. 19) [151-153]. These tapes can be linked into sheets via the addition of extra dicarboxylic acid or by introduction of further hydrogen bonding groups into the cations [154] or the anions [155]. The same bis(amidinium) cations form sheet structures with [Fe(CN)6]3, ... 

Addition of a dicarboxylate to [Zn(tmtsc)2]2+ leads to a variety of structural types, with the major factor determining the structure adopted being the relative orientation of the carboxylate groups in the anion. Linear dicarboxylates such as fumarate and terephthalate gives hydrogen-bonded tape structures, though the terephthalate compound contains expanded dimeric cations in the observed product [ Zn(tmtsc)(0H2) 2(p-terephthalate)]terephthalate 2H20 30 [163]. 

A new class of dicyanopyrazinoquinoxaline derivatives were also synthesized and tested for their electronic performance. The mobilities obtained for all the compounds (48c-48h) were very low, ranging from 10 -10 cm V s, but some of the compounds had a very uifique crystal packing arrangement that the authors referred to as a molecular tape structure arising from the C-H N intermolecular interactions. [282]... 

Tapes and ribbons have been of interest in crystal engineering due to various applications in material sciences. Stabilization of the translation of molecules through intermolecular forces in a solid can generate polarity, which is a necessary condition for a number of physical properties. For example, small-molecule nitroaniline compounds show preference for a motif that involves one amino proton associating with both oxygens of a nitro group, leading to the formation of a tape structure (Fig. 3). In particular,p-nitroaniline (1) has been studied for its non-linear optical properties [21]. 

Curling always begins with the tape edges, where the reduced thickness of the tape does not exert as much gravitational force. One of the other stress-relief mechanisms was covered in previous sections the Type II plasticizer. The Type II plasticizer in a tape structure can act as a lubricant, facilitating motion within the tape structure in response to drying stress instead of curling. 

Changes in the tape structure affect local green bulk density and lead to fluctuations in firing shrinkage. An analogy to organic solvent-based tapes would be to store a B-98 poly(vinyl butyral) tape in a... 

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