An optimised scalable synthesis of H2O@C60 and a new synthesis of H2@C60.

نویسندگان

  • Andrea Krachmalnicoff
  • Malcolm H Levitt
  • Richard J Whitby
چکیده

New high-yielding synthetic routes to the small-molecule endofullerenes H2O@C60, D2O@C60 and H2@C60 are described. The use of high temperatures and pressures for the endohedral molecule incorporation are avoided. A new partial closure step using PPh3, and final suturing using a novel Diels-Alder/retro-Diels-Alder sequence are amongst the advances reported.

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Comparison of Nuclear Spin Relaxation of H2O@C60 and H2@C60 and Their Nitroxide Derivatives.

The successful synthesis of H2O@C60 makes possible the study of magnetic interactions of an isolated water molecule in a geometrically well-defined hydrophobic environment. Comparisons are made between the T1 values of H2O@C60 and the previously studied H2@C60 and their nitroxide derivatives. The value of T1 is approximately six times longer for H2O@C60 than for H2@C60 at room temperature, is i...

متن کامل

Synthesis of polyvinyl pyridine/C60 conjugates in supercritical carbon dioxide*

In the present investigation efforts have been made to synthesis polyvinyl pyridine (PvPy) /C60 conjugates through 2, 2-azobisisobutyronitrile (AIBN) initiated insitu polymerization of PvPy in scCO2.The process of synthesis was monitored under different reaction conditions ranging 1200-1800psi, 60-90 oC over 6 hours. The progress of polymerization was monitored rheoviscometrically. The concentr...

متن کامل

Molecular surgical synthesis of H2@C60: recollections

The first synthesis of endohedral fullerene containing molecular hydrogen, H2@C60, is briefly summarized. The synthesis was conducted according to what we call the ‘molecular surgical method’, that is, opening a hole on a C60 surface, enlargement of the hole, insertion of a guest species and enclosure of the hole without loss of the encapsulated guest. The entire process involves three chemical...

متن کامل

lineshapes and scalar relaxation of the water - endofullerene

The O isotopomer of the water-endofullerene H2O@C60 displays a remarkable proton NMR spectrum, with six well resolved peaks. These peaks are due to the J-coupling between the water protons and the O nucleus, which has spin-5/2. The resolution of these peaks is enabled by the suppression of water proton exchange by the fullerene cage. The six peaks display an unusual pattern of linewidths, which...

متن کامل

Distance-Dependent Paramagnet-Enhanced Nuclear Spin Relaxation of H2@C60 Derivatives Covalently Linked to a Nitroxide Radical

A series of H2@C60 derivatives covalently linked to a nitroxide radical has been synthesized. We report distance-dependent nuclear spin relaxivity of H2 in these derivatives. The results clearly indicate that the relaxivity of H2 is distancedependent and in good agreement with the Solomon-Bloembergen equation, which predicts a 1/r dependence. SECTION Kinetics, Spectroscopy N uclear spin relaxat...

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

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Chemical communications

دوره 50 86  شماره 

صفحات  -

تاریخ انتشار 2014