Effect of lateral methyl substitution on the mesophase behaviour of some new four-ring azo-ester-azo compounds / (Record no. 75709)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03003cam a2200337 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EG-GiCUC |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250223032455.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 191208s2019 ua ho f m 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | EG-GiCUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GiCUC |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 049 ## - LOCAL HOLDINGS (OCLC) | |
| Holding library | Deposite |
| 097 ## - Thesis Degree | |
| Thesis Level | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | Cai01.12.10.M.Sc.2019.Mo.E |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Mohamed Mahfouz Kaddah Fathi |
| 245 10 - TITLE STATEMENT | |
| Title | Effect of lateral methyl substitution on the mesophase behaviour of some new four-ring azo-ester-azo compounds / |
| Statement of responsibility, etc. | Mohamed Mahfouz Kaddah Fathi ; Supervised Abelgawad A. Fahmi , Magdi M. Naoum |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | تأثير مجموعة الميثيل الأستبدالية الجانبية على سلوك الطور لبعض مركبات الآزو- استر- أزو الجديدة رباعية الحلقة |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Cairo : |
| Name of publisher, distributor, etc. | Mohamed Mahfouz Kaddah Fathi , |
| Date of publication, distribution, etc. | 2019 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 112 P. : |
| Other physical details | facsimiles , photographs ; |
| Dimensions | 25cm |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | The effect of introducing a lateral methyl substitution into the previously investigated laterally neat four-ring analogues, 4-substituted phenylazo phenyl 4ʹ-(4ʺ-alkoxyphenylazo) benzoates (Ina{u2013}e), on their mesophase behaviour was investigated for the newly prepared five homologous series of 4-substituted phenylazo phenyl 4ʹ-(3ʺ-methyl-4ʺ-alkoxyphenylazo) benzoates (IIna-e). Within each homologous series, the alkoxy group varies between 6, 8, 10, 12, 14, and 16 carbons, while the substituent, X, is a polar group that alternatively changes between the electron-donating (CH³O and CH³) and the electron-withdrawing (Br and NO²) groups, including the un-substituted homologues (Hnc). Their mesophase stabilities were determined by differential scanning calorimetry (DSC) and phases identified by polarized light microscopy (PLM). The results showed that, independent of either of the alkoxy-chain length (n) or the polarity of the substituent X, the nematic phase is predominant with relatively high stability and wide temperature ranges. All compounds show a good thermal stability in the mesophases domain, except the nitro and Br substituted derivatives bearing short alkoxy chain length. Comparison of the mesophase behavior was also made between the present series and corresponding three-ring laterally CH³-substituted azo/ester analogues. UV-vis absorption spectra revealed that both derivatives with the electron donating or the electron withdrawing groups exhibited red shifts of the s{u2192}s* transition compared with that of the un-substituted ones |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Additional physical form available note | Issued also as CD |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Four-ring azo/ester/azo derivatives |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Lateral-methyl substitution |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Mesophase stability |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Abdelgawad Ali Fahmi , |
| Relator term | |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Magdi Mekhael Naoum , |
| Relator term | |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://172.23.153.220/th.pdf">http://172.23.153.220/th.pdf</a> |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) | |
| Cataloger | Nazla |
| Reviser | Revisor |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) | |
| Cataloger | Samia |
| Reviser | Cataloger |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Source of classification or shelving scheme | Not for loan | Home library | Current library | Date acquired | Full call number | Barcode | Date last seen | Koha item type | Copy number |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 11.02.2024 | Cai01.12.10.M.Sc.2019.Mo.E | 01010110080312000 | 22.09.2023 | Thesis | ||
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | مخـــزن الرســائل الجـــامعية - البدروم | 11.02.2024 | Cai01.12.10.M.Sc.2019.Mo.E | 01020110080312000 | 22.09.2023 | CD - Rom | 80312.CD |