Photochemical Functionalization of Helicenes

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

An Efficient Synthesis of Functionalized Helicenes

[5]and [6]helicenebisquinones can be prepared easily and in quantity by combining enol ethers of 1,4diacetylbenzene or 2,7-diacetylnaphthalene with p-benzoquinone. Similar diethenyl aromatics that either have no ether functions or have them attached not to the double bonds, but to the aromatic rings, give the corresponding helicenes in only low yields and low purities. [6]Helicenebisquinone 11c...

متن کامل

Electron Delocalization in Perylene Diimide Helicenes.

We report two new helicenes derived from the double fusion of an acene with two perylene diimide (PDI) subunits. These PDI-helicene homologs exhibit very different structural and electronic properties, despite differing by only a single ring in the link between the PDI units. The shorter inter-PDI link brings the two PDI subunits closer together, and this results in the collision of their respe...

متن کامل

Nanocrystalline diamond AFM tips for chemical force spectroscopy: fabrication and photochemical functionalization†

The chemical modification of nanocrystalline diamond (NCD) atomic force microscope (AFM) tips was investigated and used for chemical force spectroscopy (CFS). In contrast to common chemical modification routes for gold or silicon AFM tips, this method creates stable C–C bonding to attach functional moieties to the NCD tip. There have been no previous studies reporting the chemical functionaliza...

متن کامل

Chiral recognition in aggregation of gold nanoparticles grafted with helicenes.

Chiral recognition was observed in the interactions of gold nanoparticles grafted with (±)-, (M)-, and (P)-helicenethiol. Although the nanoparticles contain equal enantiomeric excess, a 1:1 mixture of (M)- and (P)-nanoparticles aggregated more rapidly in solution than (±)-nanoparticles.

متن کامل

Protection of Archival Documents from Photochemical Eects

Purpose: ­The purpose of this paper is to highlight the destructive effects of light on archival documents/paper materials. ­The research aims to explain the mechanism of photochemical degradation and the damaging effect of light on paper. It also tells us about the measures to be adopted to control the deteriorating effects of light on paper step by step. Design/Methodology/Approach: Th­e res...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Chemistry – A European Journal

سال: 2019

ISSN: 0947-6539,1521-3765

DOI: 10.1002/chem.201904169