Navigation Links
Golden nanocrown
Date:5/14/2008

This release is available in German.

Chinese researchers have recently made a golden crown with a diameter of only a few nanometers. It is a large ring-shaped molecule containing 36 gold atoms. The lords of the ring, a team of researchers from the Universities of Beijing, Hong Kong, and Nanjing report their unusual compound in the journal Angewandte Chemie: the molecular ring structure is held together exclusively by goldgold bonds and is thus the largest ring system made of gold atoms produced to date.

Large molecular rings have fascinated chemists for over 40 yearsever since the discovery of crown ethers in 1967. The pioneers in this area, C. J. Pederson, J.-M. Lehn, and D. J. Cram received the Nobel Prize in Chemistry for their discovery in 1987. In the meantime, large molecular ring systems have played an important role in the search for new functional materials and in nanotechnology. The synthesis of ring systems held together exclusively by metalmetal bonds has remained a challenge.

Small rings made of positively charged gold atoms have been know for some time, but only recently could the Chinese team make a ring containing 16 gold atoms. Now, the researchers, led by Shu-Yan Yu, Yi-Zhi Li, and Vivian Wing-Wah Yam, have introduced a new representative of this class of compounds, the biggest gold ring to date that is held together by means of goldgold bonds: a ring system containing 36 univalent gold atoms.

The researchers started their synthesis with a ring system containing six gold atoms. Three of the gold atoms are linked into a triangle. Each of these gold atoms is attached to another gold atom that sticks out from the corner of the triangle. Three organic ligands are then bound to this flat double triangle to form a molecule that resembles a three-blade propeller.

Six such propellers can be linked i
'/>"/>

Contact: Shu-Yan Yu
yusy@chem.ruc.edu.cn
Wiley-Blackwell
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Emmy(R)- and Golden Globe(R)-Nominated Actress Marcia Cross to Join Lifetime Networks and Members of Congress From Both Parties at Capitol Hill Press Conference
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Golden nanocrown
(Date:8/4/2015)... , Aug. 4, 2015 Trigemina, Inc., a ... non-narcotic, nasally delivered, analgesic drug products, announced today that ... the position of chief medical officer. Dr. Kori brings ... much of which has been focused in the neuroscience ... add Dr. Kori to our clinical team given his ...
(Date:8/4/2015)... , ... August 04, 2015 , ... On August 4, ... a diverse selection of entrepreneurs from across the United States to talk about their ... is honored to be chosen to be among the attendees. , One of the ...
(Date:8/3/2015)... 2015 At the 11th hour, ... waved the shortfall of Jude Liversage,s campaign ... the first time.      (Photo: http://photos.prnewswire.com/prnh/20150803/254228 ... ) The Selective Dorsal Rhizotomy (SDR) procedure ... carry out his wish to kick a ball around ...
(Date:8/3/2015)... SAN DIEGO , Aug. 3, 2015  Aethlon Medical, ... affinity biofiltration devices to treat life-threatening diseases, today announced ... investor conference call and webcast on Thursday, August 13, ... call and webcast will follow the release of fiscal ... call will be available approximately two hours after the ...
Breaking Biology Technology:Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 2Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 3White House Invites uBiome CEO Jessica Richman to First-Ever Startup Demo Day 2Cerebral Palsy Operation by The Portland Hospital Allows a Boy to Stand Properly for the First Time 2Cerebral Palsy Operation by The Portland Hospital Allows a Boy to Stand Properly for the First Time 3Aethlon Medical To Host First Quarter Fiscal 2016 Investor Call on August 13, 2015 2
... Imaging Diagnostic Systems, Inc., (OTC Bulletin Board: ... exhibit the CT Laser Mammography (CTLM(R)) system at the Arab ... Arab Emirates (UAE). The company will demonstrate the CTLM ... UAE and intends to secure prospective sales of the CTLM ...
... and consulting firm, Fadel Partners Inc., a certified partner ... year revenue growth of 13% for 2008, and expects ... company,s report stands in contrast to analyst estimates of ... U.S. IT services industry overall, as the economic downturn ...
... Development Program Has Been Approved For Second-Year Funding ... of the Chief Scientist-NES-ZIONA, Israel, Jan. 27 ... that its Israeli-based R&D subsidiary has received approval ... Office of the Chief Scientist ("OCS") in support ...
Cached Biology Technology:Imaging Diagnostic Systems Exhibits at Major Middle East Health Conference 2Fadel Partners Announces 13% Growth Despite IT Services Industry Downtrend 2Modigene Awarded Second-Year Grant by Israeli Government to Support Development of Its Longer-Acting Human Growth Hormone 2Modigene Awarded Second-Year Grant by Israeli Government to Support Development of Its Longer-Acting Human Growth Hormone 3Modigene Awarded Second-Year Grant by Israeli Government to Support Development of Its Longer-Acting Human Growth Hormone 4
(Date:7/31/2015)... Den 10. internationale konference om Genomik (ICG-10, ... - 25. oktober i Shenzhen , ... i år. Siden starten i 2006 er ICB blevet ... og er en af de mest dynamiske, entusiastiske og ... nylige gennembrud og fremskridt inden for ,omik,-forskning, som yderligere ...
(Date:7/31/2015)... La 10 th International Conference on Genomics ... 22 al 25 de octubre de 2015 en ... conferencia celebra su décimo aniversario. Desde su inauguración en el ... reuniones anuales más influyentes del mundo en el campo ,ómico, ... y mejores a nivel científico. ICG-10 se ...
(Date:7/30/2015)... , July 30, 2015 Cellecta, ... for gene function analysis and biomarker discovery, announced ... (sgRNA) Knockout Library targeting all human protein coding ... permanently "knock out" a gene,s function. Cellecta,s new ... high throughput screening tool so that researchers can ...
Breaking Biology News(10 mins):Den 10. internationale konference om Genomics (ICG-10) åbner i oktober 2La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 2La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 3CELLECTA, INC. Announces Launch of Human Whole Genome CRISPR Knockout Library 2
... to reduce sickness and death from infections that patients ... identifying ways to reduce the problem at its source. ... cubes or to rinse medical equipment is increasingly being ... contribute to many of these life-threatening infections. , Infection ...
... Commissioner Antonia C. Novello, M.D., M.P.H., Dr.P.H., today announced ... and Education campaign to help combat the potential spread ... virus that causes AIDS. , Dr. Novello said, "In ... strain of HIV in New York City, we must ...
... characteristic of diverse species of birds, but how this ... proves useful have remained uncertain. Researchers this week report ... bobbing is critical for the stabilization of their visual ... enables the accurate detection of objects such as food ...
Cached Biology News:Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST) 2Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST) 3AIDS Public Awareness Campaign Expands Following Report Of Rapidly Progressive HIV 2AIDS Public Awareness Campaign Expands Following Report Of Rapidly Progressive HIV 3Bobbing birds do it for a reason 2
Derlin-2 (C-18)...
CBF-B (G-2)...
Mouse monoclonal [164-12-2] to Ampicillin ( Abpromise for all tested applications)....
Flotillin-2 (ESA) Purified Anti-Mouse, Anti-Rat, Anti-Human, Anti-Dog, Anti-Chicken clone 29, Isotype Mouse IgG 1 , 150 µg Consult technical datasheet for details....
Biology Products: