The effect of terminal alkoxy groups proportionation on the mesophase behavior of some new azo/ester based liquid crystalline compounds / (رقم التسجيلة. 77930)
[ عرض عادي ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 03060cam a2200349 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EG-GiCUC |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250223032604.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 200927s2020 ua dh 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.2020.Ay.E |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Aya Mahmoud Abdelrahman |
| 245 14 - TITLE STATEMENT | |
| Title | The effect of terminal alkoxy groups proportionation on the mesophase behavior of some new azo/ester based liquid crystalline compounds / |
| Statement of responsibility, etc. | Aya Mahmoud Abdelrahman ; Supervised Abdelgawad A. Fahmi , Magdi M. Naoum , Nagwa H.S. Ahmed |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | تأثير تجزئة مجموعتى الألكوكسى الطرفيتين على سلوك طور الوسط لبعض مركبات البللورات السائلة الجديدة المبنية على الآزو/أستر |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Cairo : |
| Name of publisher, distributor, etc. | Aya Mahmoud Abdelrahman , |
| Date of publication, distribution, etc. | 2020 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 119 , (25) P. : |
| Other physical details | charts , facsimiles ; |
| Dimensions | 25cm |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Cairo University - Faculty of Science- Department of Organic Chemistry |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Two series of newly prepared liquid crystalline compounds, each is formed from twenty four different homologues, were prepared and investigated for their mesophase behaviour. The first group has the formula 4-alkoxy phenylazo phenyl 4ʹ-(43-alkoxyphenylazo) benzoates (Im/n), while the second group possesses the formula 4-alkoxy phenylazo phenyl 4ʹ-(4{u2032}{u2032}-alkoxyphenylazo) benzoates (IIm/n). Within each series, the length of the terminal alkoxy group attached to the benzoate moiety (n) varies between 8 and 16 carbons, while the length of the other alkoxy group, attached to phenolic portion, varies between 6 and 12 carbons. Their mesophase characteristics were examined via differential scanning calorimetry (DSC) and the type of the phase is identified by polarized light microscopy (PLM). These newly prepared compounds were structurally characterized by infrared, ¹ H-NMR, mass spectroscopy, thermogravemetric and elemental analyses. Comparative study was first made between the two series (Im/n) and (IIm/n), aiming to investigate the effect of replacing the azo group with an azomethine one on their mesophase behaviour. A second comparative study was made between the prepared four-ring compounds, series Im/n, and their corresponding previously investigated threering azo/ester analogues namely, 4-alkoxyphenyl 4ʹ-(4{u2032}{u2032}-alkoxyphenylazo) benzoates (IIIm/n). The stabilities and mesomorphic ranges of the prepared fourring compounds (Im/n) were found to be significantly higher than those of their three rings analogues (IIIm/n) |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Additional physical form available note | Issued also as CD |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Azo/ester/azomethine |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Liquid crystalline |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Terminal alkoxy |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Abdelgawad A. Fahmi , |
| Relator term | |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Magdi M. Naoum , |
| Relator term | |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nagwa H.S. Ahmed , |
| 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 | Shimaa |
| 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.2020.Ay.E | 01010110081597000 | 22.09.2023 | Thesis | ||
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | مخـــزن الرســائل الجـــامعية - البدروم | 11.02.2024 | Cai01.12.10.M.Sc.2020.Ay.E | 01020110081597000 | 22.09.2023 | CD - Rom | 81597.CD |