Definitions for cucurbituril
cu·cur·bi·turil

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1. cucurbiturilnoun

   Any of a class of macrocyclic molecules consisting of glycoluril repeat units.

2. Etymology: From cucurbit, due to the resemblance between the molecular structure and the appearance of a pumpkin.

WikipediaRate this definition:0.0 / 0 votes

1. Cucurbituril

   In host-guest chemistry, cucurbiturils are macrocyclic molecules made of glycoluril (=C4H2N4O2=) monomers linked by methylene bridges (−CH2−). The oxygen atoms are located along the edges of the band and are tilted inwards, forming a partly enclosed cavity (cavitand). The name is derived from the resemblance of this molecule with a pumpkin of the family of Cucurbitaceae. Cucurbiturils are commonly written as cucurbit[n]uril, where n is the number of glycoluril units. Two common abbreviations are CB[n], or simply CBn. These compounds are particularly interesting to chemists because they are suitable hosts for an array of neutral and cationic species. The binding mode is thought to occur through hydrophobic interactions, and, in the case of cationic guests, through cation-dipole interactions as well. The dimensions of cucurbiturils are generally on the ~10 Å size scale. For instance, the cavity of cucurbit[6]uril has a height ~9.1 Å, an outer diameter ~5.8 Å, and an inner diameter ~3.9 Å.Cucurbiturils were first synthesized in 1905 by Robert Behrend, by condensing glycoluril with formaldehyde, but their structure was not elucidated until 1981. The field expanded as CB5, CB7, and CB8 were discovered and isolated by Kim Kimoon in the year 2000. To date cucurbiturils composed of 5, 6, 7, 8, 10, and 14 repeat units have all been isolated, which have internal cavity volumes of 82, 164, 279, 479, and 870 Å3 respectively. A cucurbituril composed of 9 repeat units has yet to be isolated (as of 2009). Other common molecular capsules that share a similar molecular shape with cucurbiturils include cyclodextrins, calixarenes, and pillararenes.

WikidataRate this definition:0.0 / 0 votes

1. Cucurbituril

   Cucurbiturils are macrocyclic molecules made of glycoluril monomers linked by methylene bridges. The oxygen atoms are located along the edges of the band and are tilted inwards, forming a partly enclosed cavity. The name is derived from the resemblance of this molecule with a pumpkin of the family of Cucurbitaceae. Cucurbiturils are commonly written as cucurbit[n]uril, where n is the number of glycoluril units. Two common abbreviations are CB[n], or simply CBn. These compounds are particularly interesting to chemists because they are suitable hosts for an array of neutral and cationic species. The binding mode is thought to occur through hydrophobic interactions, and, in the case of cationic guests, through cation-dipole interactions as well. The dimensions of cucurbiturils are generally on the ~ 10 Å size scale. For instance, the cavity of cucurbit[6]uril has a height ~ 9.1 Å, an outer diameter ~ 5.8 Å, and an inner diameter ~ 3.9 Å. Cucurbiturils were first synthesized in 1905 by Behrend, by condensing glycoluril with formaldehyde, but their structure was not elucidated until 1981. To date cucurbiturils composed of 5, 6, 7, 8, and 10 repeat units have all been isolated, which have internal cavity volumes of 82, 164, 279, 479, and 870 ų respectively. A cucurbituril composed of 9 repeat units has yet to be isolated. Other common molecular capsules that share a similar molecular shape with cucurbiturils include cyclodextrins, calixarenes, and pillararenes.

How to pronounce cucurbituril?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say cucurbituril in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of cucurbituril in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of cucurbituril in Pythagorean Numerology is: 4

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Cucurbituril
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Cucurbituril
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=cucurbituril