DEAR DR. WALD:

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79-00798A000300020006-7
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 8
• Document Creation Date: December 9, 2016
• Document Release Date: July 19, 2000
• Sequence Number: 6
• Publication Date: December 6, 1973
• Content Type: LETTER

" Approved For Releagtr2000/08/31 : CIA-RDP79-0079854000300020006-7
Princeton t fruversity DEPARTMENT OF CHEMISTRY
PRINCETON, NEW JERSEY 08540
December 6, 1973
Dr. Royal Wald
SCI-SA, Room-830
State Department
Washington, D.C. 20520
Dear Dr. Wald:
I am sending by separate mail two samples to be
transmitted to Dr. Tech of the U.S. Embassy, Moscow,
Dr. Krylov of the Institute of Chemical Physics. The
can be looked at. They are essentially neutral water
slight amount of platinum and gold particles. There
danger of breakage. If there is any leakage, it will
picked up by the porous surrounding material. These
will be transmitted by Dr. Krylov to Dr. Sokolski of
Institute of Physical Chemistry at Alma Ata.
Thank you ,for your courtesy in this matter.
JT:dhl
Encs.
cc: Dr. T. W. DeWitt, NSF
Dr. E. D. Stevenson, AEC
Prof. W. Keith Hall
Dr. Ealdeschwieler
Sincerely yours,
John Turkevich
for
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State Dept. declassification & release instructions on file
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DEPARTMENT OF STATE
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TO
Amembassy MOSCOW
FortheAth9mionof
SCIATT
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70 THE DEPARTMENT
[5il For Transmittal to Addressee
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ri Post Information Only
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EDinform:
REFERENCE
ITEMS/REMARKS
Letter to Professor O.V. grylov fr.
John Turkevich, 12/6/73. & package.
Please initial and return.
Registry No. 813735
IN REPLY REFER TO FILE NUMBER AND DRAFTING OFFICE
FILE NO.
CLASSIFICATION
uncLAssIFIED
FORM
12-64
..??????
SIGNATURE
Royal Wald
OFFICE
SCl/SA
* U.S. GOVERNMENT PRINTING OFFICE : 1973-725-341/417 3-I
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Princeton University DEPARTMENT OF CHEMISTRY
PRINCETON, NEW JERSEY 08540
Professor O. V. Krylov
Deputy Director
Institute of Chemical Physics
USSR Academy of Sciences
Voroblevskoye shosse, 2
Moscow, USSR
.Dear Oleg Valentinovich:
December 6, 1973
I just received your letter of October 26 via the State
Department. It seems to take them longer than by direct communi-
cation. I am sending this letter to your directly and a copy for
transmission by the State Department. I am also sending via the
State Department two samples of colloids: one of gold 200A, and
another of platinum for transmission by you to Prof. Sokolski at
Alma Ata. These samples are monodisperse and have been well char-
acterized by us. He had been planning to do some electrochemical
experiments on them. If Professor Gryaznev wishes some platinum
or gold colloids, we shall be able to furnish him also with these.
We are in the process of preparing 107 dispersion of gold 201
and of platinum 301, in the following: gelatin, polyvinyl alochol
and polyacrylic acid. We have found by color observation that the
gold is not coagulant on evaporation. These materials can be used
? for preliminary work on Mtissbauer effect, small angle x-ray scat-
tering and wide angle x-ray line shapes. Once these preparations
are finished we are going to do the same thing for platinum.
We have looked at the catalytic nature of platinum particles
on Baymol (fibrous alumina) and have indications that in our simple
preparation the platinum particles are clustered. We have used gol
as a test colloid and are developing techniques in which the gold
seems to remain dispersed without coagulation on the Baymol.
Catalytic samples Of ethylene, propylene, cyclohexene, and
benzene gave us on poisoning about 10% of the surface atoms of
platinum. We do not know yet whether this number represents the
fraction of platinum atoms that are active or is due to a decrease
in area due to clusters and sintering. It is of interest, however,
that the number of centers for ethylene hydrogenation is the same
as for hydrogen deuterium exchange.
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,Prot. 0. V.vierylov 2 December 6, 1973
I learned that Professor Cryaznev's group did not come to
the United States in November. As I mentioned before, I shall be
very happy to see you, Professor Gryaznev and other Soviet col-
leagues at Princeton.
lam
JT:dhl
Eric.
Enclosed please find a spectrum of the materials.
With best wishes to yourself and to Zenida Leonidovna,
Sincerely yours,
John Turkevich
cc: Dr. Royal Wald, State Department
Dr. T. W. DeWitt, NSF
Prof. W. Keith Hall
Dr. E. Dee Stevenson, AEC
Prof. J. D. Baldeschwieler, Cal. Tech.
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