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123126-44-3

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123126-44-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 123126-44-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,1,2 and 6 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 123126-44:
(8*1)+(7*2)+(6*3)+(5*1)+(4*2)+(3*6)+(2*4)+(1*4)=83
83 % 10 = 3
So 123126-44-3 is a valid CAS Registry Number.

123126-44-3Relevant articles and documents

Distance Matters: Biasing Mechanism, Transfer of Asymmetry, and Stereomutation in N-Annulated Perylene Bisimide Supramolecular Polymers

Aragó, Juan,Calbo, Joaquín,Cerdá, Jesús,Crassous, Jeanne,Doncel-Giménez, Azahara,Martínez, Manuel A.,Ortí, Enrique,Rodríguez, Rafael,Sánchez, Luis

, p. 13281 - 13291 (2021/09/03)

The synthesis of two series of N-annulated perylene bisimides (PBIs), compounds 1 and 2, is reported, and their self-assembling features are thoroughly investigated by a complete set of spectroscopic measurements and theoretical calculations. The study co

Two-component gelation and morphology-dependent conductivity of a naphthalene-diimide (NDI) π-system by orthogonal hydrogen bonding

Kar, Haridas,Molla, Mijanur Rahaman,Ghosh, Suhrit

supporting information, p. 4220 - 4222 (2013/06/05)

The utility of an external structure-directing agent to induce orthogonal H-bonding-mediated programmed supramolecular-assembly and gelation of an n-type NDI chromophore is reported. Further, the effect of π-stacking and morphology on electrical conductivity of semiconducting NDI building blocks is revealed.

Complexation-induced unfolding of heterocyclic ureas. Simple foldamers equilibrate with multiply hydrogen-bonded sheetlike structures

Corbin,Zimmerman,Thiessen,Hawryluk,Murray

, p. 10475 - 10488 (2007/10/03)

The synthesis and conformational studies of heterocyclic ureas (amides) 1-7 and their concentration-dependent unfolding to form multiply hydrogen-bonded complexes are described. Ureas 1 and 7 were prepared by reacting 2-aminopyridine and aminonaphthyridine 25, respectively, with triphosgene and 4-(dimethylamino)-pyridine (DMAP). Amine 25, in turn, was synthesized by a Knorr condensation of 2,6-diaminopyridine and 4,6-nonanedione. Heterocyclic ureas 3, 4, and 16 were prepared by treating their corresponding amino precursors with butylisocyanate, whereas bisureido naphthyridines 6 and 17 were prepared by heating 2,7-diamino-1,8-naphthyridine (13) with butylisocyanate and 3,4,5-tridodecyloxyphenyl isocyanate, respectively. The hydrogen-bonding modules 2 and 5 were synthesized by reacting 13 and 2-amino-1,8-naphthyridine with valeric anhydride. X-ray crystallographic analyses were performed on ureas 1, 3, 16, and 17, indicating that these ureas are intramolecularly hydrogen-bonded in the solid state. Moreover, detailed 1H NMR solution studies of 1, 3, 4, 6, and 7 indicate that similar folded structures form in chloroform. In addition, naphthyridinylureas 3 and 7 unfold and dimerize by forming four hydrogen bonds at high concentrations, and ureas 1 and 4 unfold in the presence of their hydrogen-bonding complements, amides 2 and 5, to form Complexes with three and four hydrogen bonds, respectively. Likewise, the mixing of 6 and 7 results in a mutual unfolding and formation of a robust, sheetlike, sextuply hydrogen-bonded complex. The hydrogen-bonding modules described are useful building blocks for self-assembly, and the unfolding process represents a very primitive mimicry of the helix-to-sheet transition shown by peptides and potentially shown by the hypothetical naphthyridinylurea 8.

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