{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0810"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0810","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"LASER-RAMAN ΦΑΣΜΑΤΑ ΟΥΣΙΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ","abstract":"THE SUBJECT OF THIS THESIS IS THE STUDY OF THE LASER-RAMAN SPECTRA OF CERTAIN SUBSTANCES IN THE STATE OF ADSORPTION ON THE FOLLOWING SUBSTRATES: SIO2, AL2O3, SIO2, AL2O3 ON SIO2 AND BENTONITE. THE SUBSTANCES USED WERE NAPHTHALENE, TRIPHENYLMETHANE, (AND SOME OF ITS DERIVATIVES), TRIPHENYLAMINE, ANTHRACENE, DIPHENYLAMINE AND THE BINARY MIXTURES: C6H6-CLL4 AND C6H6-CHCL3. RAMAN SHIFTS OF THE ADSORBED MOLECULES WERE OBSERVED AND COMPARED WITH THE PURE SUBSTANCES. CHANGES OF THE RELATIVE INTENSITES AND APPEARENCE OF NEW BANDS WERE ALSO OBSERVED IN THERAMAN SPECTRA OF THE ADSORBED SUBSTANCES WHICH ARE NOT SHOWN IN THE RAMAN SPECTRA OF THE PURE COMPOUNDS. IN THE CASE OF THE ADSORPTION OF THE ABOVE MENTIONEDCOMPOUNDS ON SIO2, AL2O3, SUBSTRATE COLOURED COMPOUNDS ARE FORMED, SOME OF WHICH SHOW RESONANCE RAMAN SPECTRA WHEN THE ADSORBED SUBSTANCES COVERS THE SUBSTRATE SURFACE IN AMOUNT SMALLER THAN 0,01 OF A MONOLAYER. FROM THE CHANGE OF THE INTENSITY OF THE LOW FREQUENCY RAMAN BANDS OF THE ADSORBED SUBSTANCES IT IS CONCLUDED THAT THE MELTING POINT OF THE ADSORBED SUBSTANCES IS LOWER THAN IN THE USUAL STATE. IN THE RAMAN SPECTRA OF CERTAIN ADSORBED MOLECULES BELONGING TO THE TD POINT GROUP, SOME BANDS DUE TO THE DEGENERATE VIBRATIONS ARE SPLIT TO TWO ORTHREE BANDS OWING TO THE REMOVAL OF THE DEGENERACY BY ADSORPTION.","abstract_html":"THE SUBJECT OF THIS THESIS IS THE STUDY OF THE LASER-RAMAN SPECTRA OF CERTAIN SUBSTANCES IN THE STATE OF ADSORPTION ON THE FOLLOWING SUBSTRATES: SIO2, AL2O3, SIO2, AL2O3 ON SIO2 AND BENTONITE. THE SUBSTANCES USED WERE NAPHTHALENE, TRIPHENYLMETHANE, (AND SOME OF ITS DERIVATIVES), TRIPHENYLAMINE, ANTHRACENE, DIPHENYLAMINE AND THE BINARY MIXTURES: C6H6-CLL4 AND C6H6-CHCL3. RAMAN SHIFTS OF THE ADSORBED MOLECULES WERE OBSERVED AND COMPARED WITH THE PURE SUBSTANCES. CHANGES OF THE RELATIVE INTENSITES AND APPEARENCE OF NEW BANDS WERE ALSO OBSERVED IN THERAMAN SPECTRA OF THE ADSORBED SUBSTANCES WHICH ARE NOT SHOWN IN THE RAMAN SPECTRA OF THE PURE COMPOUNDS. IN THE CASE OF THE ADSORPTION OF THE ABOVE MENTIONEDCOMPOUNDS ON SIO2, AL2O3, SUBSTRATE COLOURED COMPOUNDS ARE FORMED, SOME OF WHICH SHOW RESONANCE RAMAN SPECTRA WHEN THE ADSORBED SUBSTANCES COVERS THE SUBSTRATE SURFACE IN AMOUNT SMALLER THAN 0,01 OF A MONOLAYER. FROM THE CHANGE OF THE INTENSITY OF THE LOW FREQUENCY RAMAN BANDS OF THE ADSORBED SUBSTANCES IT IS CONCLUDED THAT THE MELTING POINT OF THE ADSORBED SUBSTANCES IS LOWER THAN IN THE USUAL STATE. IN THE RAMAN SPECTRA OF CERTAIN ADSORBED MOLECULES BELONGING TO THE TD POINT GROUP, SOME BANDS DUE TO THE DEGENERATE VIBRATIONS ARE SPLIT TO TWO ORTHREE BANDS OWING TO THE REMOVAL OF THE DEGENERACY BY ADSORPTION.","abstract_has_math":false,"creators":["Παπαβασιλείου, Γεώργιος","Papavassiliou, Georgios"],"institution":"Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1972,"date_issued":"1972","date_published":"1972","updated_at":"2026-07-24T02:25:27Z","subjects":["ADSORBED MOLECULES","Adsorption","Laser raman spectroscopy","ΠΡΟΣΡΟΦΗΜΕΝΑ ΜΟΡΙΑ","Προσρόφηση","ΦΑΣΜΑΤΟΣΚΟΠΙΑ LASER-RAMAN","Φυσικές Επιστήμες","Natural Sciences","Χημεία","Chemical Sciences"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0810"],"render_values":[{"text":"10.12681/eadd/0810","href":"https://doi.org/10.12681/eadd/0810","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0810","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Παπαβασιλείου, Γεώργιος","Papavassiliou, Georgios"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1972"]},{"key":"dc:publisher","label":"Institution","values":["Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)","National and Kapodistrian University of Athens"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ADSORBED MOLECULES","Adsorption","Laser raman spectroscopy","ΠΡΟΣΡΟΦΗΜΕΝΑ ΜΟΡΙΑ","Προσρόφηση","ΦΑΣΜΑΤΟΣΚΟΠΙΑ LASER-RAMAN","Φυσικές Επιστήμες","Natural Sciences","Χημεία","Chemical Sciences"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0810","http://hdl.handle.net/10442/hedi/0810"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE SUBJECT OF THIS THESIS IS THE STUDY OF THE LASER-RAMAN SPECTRA OF CERTAIN SUBSTANCES IN THE STATE OF ADSORPTION ON THE FOLLOWING SUBSTRATES: SIO2, AL2O3, SIO2, AL2O3 ON SIO2 AND BENTONITE. THE SUBSTANCES USED WERE NAPHTHALENE, TRIPHENYLMETHANE, (AND SOME OF ITS DERIVATIVES), TRIPHENYLAMINE, ANTHRACENE, DIPHENYLAMINE AND THE BINARY MIXTURES: C6H6-CLL4 AND C6H6-CHCL3. RAMAN SHIFTS OF THE ADSORBED MOLECULES WERE OBSERVED AND COMPARED WITH THE PURE SUBSTANCES. CHANGES OF THE RELATIVE INTENSITES AND APPEARENCE OF NEW BANDS WERE ALSO OBSERVED IN THERAMAN SPECTRA OF THE ADSORBED SUBSTANCES WHICH ARE NOT SHOWN IN THE RAMAN SPECTRA OF THE PURE COMPOUNDS. IN THE CASE OF THE ADSORPTION OF THE ABOVE MENTIONEDCOMPOUNDS ON SIO2, AL2O3, SUBSTRATE COLOURED COMPOUNDS ARE FORMED, SOME OF WHICH SHOW RESONANCE RAMAN SPECTRA WHEN THE ADSORBED SUBSTANCES COVERS THE SUBSTRATE SURFACE IN AMOUNT SMALLER THAN 0,01 OF A MONOLAYER. FROM THE CHANGE OF THE INTENSITY OF THE LOW FREQUENCY RAMAN BANDS OF THE ADSORBED SUBSTANCES IT IS CONCLUDED THAT THE MELTING POINT OF THE ADSORBED SUBSTANCES IS LOWER THAN IN THE USUAL STATE. IN THE RAMAN SPECTRA OF CERTAIN ADSORBED MOLECULES BELONGING TO THE TD POINT GROUP, SOME BANDS DUE TO THE DEGENERATE VIBRATIONS ARE SPLIT TO TWO ORTHREE BANDS OWING TO THE REMOVAL OF THE DEGENERACY BY ADSORPTION.","ΜΕΛΕΤΩΝΤΑΙ ΤΑ ΦΑΣΜΑΤΑ LASER-RAMAN ΜΕΡΙΚΩΝ ΟΥΣΙΩΝ ΠΡΟΣΡΟΦΗΜΕΝΩΝ ΕΙΣ SIO2, AL2O3,SIO2, AL2O3, AL2O3 ΕΠΙ SIO2 ΚΑΙ ΕΙΣ ΜΠΕΝΤΟΝΙΤΗΝ. ΑΙ ΧΡΗΣΙΜΟΠΟΙΗΘΕΙΣΑΙ ΟΥΣΙΑΙ ΕΙΝΑΙ ΤΟ ΝΑΦΘΑΛΙΝΙΟΝ, ΤΟ ΤΡΙΦΑΙΝΥΛΟΜΕΘΑΝΙΟΝ (ΚΑΙ ΜΕΡΙΚΑ ΠΑΡΑΓΩΓΑ ΑΥΤΟΥ), Η ΤΡΙΦΑΙΝΥΛΑΜΙΝΗ, ΤΟ ΑΝΘΡΑΚΕΝΙΟΝ, Η ΔΙΦΑΙΝΥΛΑΜΙΝΗ ΚΑΙ ΤΑ ΔΥΑΔΙΚΑ ΜΙΓΜΑΤΑ C6H6-CCL4 ΚΑΙC6H6-CHCL3. ΕΙΣ ΤΑ ΦΑΣΜΑΤΑ RAMAN ΤΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ ΜΟΡΙΩΝ ΠΑΡΑΤΗΡΟΥΝΤΑΙ ΜΕΤΑΤΟΠΙΣΕΙΣ ΤΩΝ ΤΑΙΝΙΩΝ, ΜΕΤΑΒΟΛΗ ΤΗΣ ΣΧΕΤΙΚΗΣ ΕΝΤΑΣΕΩΣ ΑΥΤΩΝ ΚΑΙ ΕΜΦΑΝΙΣΙΣ ΝΕΩΝ ΤΑΙΝΙΩΝ, ΑΙ ΟΠΟΙΑΙ ΔΕΝ ΑΠΑΝΤΟΥΝ ΕΙΣ ΤΟ ΦΑΣΜΑ RAMAN ΤΗΣ ΚΑΘΑΡΑΣ ΟΥΣΙΑΣ. ΕΙΣ ΤΗΝ ΠΕΡΙΠΤΩΣΙΝ ΠΡΟΣΡΟΦΗΣΕΩΣ ΤΩΝ ΑΝΩΤΕΡΩ ΟΥΣΙΩΝ ΕΙΣ SIO2, AL2O3 ΣΧΗΜΑΤΙΖΟΝΤΑΙ ΧΡΩΜΑΤΙΣΜΕΝΑΙ ΕΝΩΣΕΙΣ, ΕΚ ΤΩΝ ΟΠΟΙΩΝ ΜΕΡΙΚΑΙ ΔΙΔΟΥΝ ΦΑΣΜΑ RAMAN ΕΚ ΣΥΝΤΟΝΙΣΜΟΥ (RESONANCE) ΥΠΟ ΕΠΙΚΑΛΥΨΙΝ ΤΟΥ 0,01 ΤΗΣ ΜΟΝΟΜΟΡΙΑΚΗΣ. ΤΟ ΣΗΜΕΙΟΝ ΤΗΞΕΩΣ ΤΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ ΟΥΣΙΩΝ ΠΑΡΕΤΗΡΗΘΗ ΕΚ ΤΗΣ ΜΕΤΑΒΟΛΗΣ ΤΗΣ ΕΝΤΑΣΕΩΣ ΤΩΝ ΤΑΙΝΙΩΝ RAMAN ΧΑΜΗΛΗΣ ΣΥΧΝΟΤΗΤΟΣ ΚΑΙ ΕΥΡΕΘΗ ΧΑΜΗΛΟΤΕΡΟΝ ΤΟΥ ΣΗΜΕΙΟΥ ΤΗΞΕΩΣ ΤΗΣ ΟΥΣΙΑΣ ΕΙΣ ΣΥΝΗΘΗ ΚΑΤΑΣΤΑΣΙΝ ΕΙΣ ΤΟ ΦΑΣΜΑ RAMAN ΜΕΡΙΚΩΝ ΠΡΟΣΡΟΦΗΜΕΝΩΝ ΟΥΣΙΩΝ ΜΕ TD ΣΥΜΜΕΤΡΙΑΝ ΜΕΡΙΚΑΙ ΤΑΙΝΙΑΙ ΑΙ ΟΠΟΙΑΙ ΟΦΕΙΛΟΝΤΑΙ ΕΙΣ ΕΚΦΥΛΙΣΜΕΝΑΣ ΤΑΛΑΝΤΩΣΕΙΣ, ΔΙΑΣΠΩΝΤΑΙ ΕΙΣ ΔΥΟ 'Η ΤΡΕΙΣ ΛΟΓΩ ΑΡΣΕΩΣ ΤΟΥ ΕΚΦΥΛΙΣΜΟΥ ΚΑΤΑ ΤΗΝ ΠΡΟΣΡΟΦΗΣΙΝ."]},{"key":"dc:title","label":"Title","values":["LASER-RAMAN ΦΑΣΜΑΤΑ ΟΥΣΙΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ","LASER-RAMAN SPECTRA OF ADSORBED MOLECULES"]}]}],"canonical_facts":{"dc:creator":["Παπαβασιλείου, Γεώργιος","Papavassiliou, Georgios"],"dc:date":["1972"],"dc:description":["THE SUBJECT OF THIS THESIS IS THE STUDY OF THE LASER-RAMAN SPECTRA OF CERTAIN SUBSTANCES IN THE STATE OF ADSORPTION ON THE FOLLOWING SUBSTRATES: SIO2, AL2O3, SIO2, AL2O3 ON SIO2 AND BENTONITE. THE SUBSTANCES USED WERE NAPHTHALENE, TRIPHENYLMETHANE, (AND SOME OF ITS DERIVATIVES), TRIPHENYLAMINE, ANTHRACENE, DIPHENYLAMINE AND THE BINARY MIXTURES: C6H6-CLL4 AND C6H6-CHCL3. RAMAN SHIFTS OF THE ADSORBED MOLECULES WERE OBSERVED AND COMPARED WITH THE PURE SUBSTANCES. CHANGES OF THE RELATIVE INTENSITES AND APPEARENCE OF NEW BANDS WERE ALSO OBSERVED IN THERAMAN SPECTRA OF THE ADSORBED SUBSTANCES WHICH ARE NOT SHOWN IN THE RAMAN SPECTRA OF THE PURE COMPOUNDS. IN THE CASE OF THE ADSORPTION OF THE ABOVE MENTIONEDCOMPOUNDS ON SIO2, AL2O3, SUBSTRATE COLOURED COMPOUNDS ARE FORMED, SOME OF WHICH SHOW RESONANCE RAMAN SPECTRA WHEN THE ADSORBED SUBSTANCES COVERS THE SUBSTRATE SURFACE IN AMOUNT SMALLER THAN 0,01 OF A MONOLAYER. FROM THE CHANGE OF THE INTENSITY OF THE LOW FREQUENCY RAMAN BANDS OF THE ADSORBED SUBSTANCES IT IS CONCLUDED THAT THE MELTING POINT OF THE ADSORBED SUBSTANCES IS LOWER THAN IN THE USUAL STATE. IN THE RAMAN SPECTRA OF CERTAIN ADSORBED MOLECULES BELONGING TO THE TD POINT GROUP, SOME BANDS DUE TO THE DEGENERATE VIBRATIONS ARE SPLIT TO TWO ORTHREE BANDS OWING TO THE REMOVAL OF THE DEGENERACY BY ADSORPTION.","ΜΕΛΕΤΩΝΤΑΙ ΤΑ ΦΑΣΜΑΤΑ LASER-RAMAN ΜΕΡΙΚΩΝ ΟΥΣΙΩΝ ΠΡΟΣΡΟΦΗΜΕΝΩΝ ΕΙΣ SIO2, AL2O3,SIO2, AL2O3, AL2O3 ΕΠΙ SIO2 ΚΑΙ ΕΙΣ ΜΠΕΝΤΟΝΙΤΗΝ. ΑΙ ΧΡΗΣΙΜΟΠΟΙΗΘΕΙΣΑΙ ΟΥΣΙΑΙ ΕΙΝΑΙ ΤΟ ΝΑΦΘΑΛΙΝΙΟΝ, ΤΟ ΤΡΙΦΑΙΝΥΛΟΜΕΘΑΝΙΟΝ (ΚΑΙ ΜΕΡΙΚΑ ΠΑΡΑΓΩΓΑ ΑΥΤΟΥ), Η ΤΡΙΦΑΙΝΥΛΑΜΙΝΗ, ΤΟ ΑΝΘΡΑΚΕΝΙΟΝ, Η ΔΙΦΑΙΝΥΛΑΜΙΝΗ ΚΑΙ ΤΑ ΔΥΑΔΙΚΑ ΜΙΓΜΑΤΑ C6H6-CCL4 ΚΑΙC6H6-CHCL3. ΕΙΣ ΤΑ ΦΑΣΜΑΤΑ RAMAN ΤΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ ΜΟΡΙΩΝ ΠΑΡΑΤΗΡΟΥΝΤΑΙ ΜΕΤΑΤΟΠΙΣΕΙΣ ΤΩΝ ΤΑΙΝΙΩΝ, ΜΕΤΑΒΟΛΗ ΤΗΣ ΣΧΕΤΙΚΗΣ ΕΝΤΑΣΕΩΣ ΑΥΤΩΝ ΚΑΙ ΕΜΦΑΝΙΣΙΣ ΝΕΩΝ ΤΑΙΝΙΩΝ, ΑΙ ΟΠΟΙΑΙ ΔΕΝ ΑΠΑΝΤΟΥΝ ΕΙΣ ΤΟ ΦΑΣΜΑ RAMAN ΤΗΣ ΚΑΘΑΡΑΣ ΟΥΣΙΑΣ. ΕΙΣ ΤΗΝ ΠΕΡΙΠΤΩΣΙΝ ΠΡΟΣΡΟΦΗΣΕΩΣ ΤΩΝ ΑΝΩΤΕΡΩ ΟΥΣΙΩΝ ΕΙΣ SIO2, AL2O3 ΣΧΗΜΑΤΙΖΟΝΤΑΙ ΧΡΩΜΑΤΙΣΜΕΝΑΙ ΕΝΩΣΕΙΣ, ΕΚ ΤΩΝ ΟΠΟΙΩΝ ΜΕΡΙΚΑΙ ΔΙΔΟΥΝ ΦΑΣΜΑ RAMAN ΕΚ ΣΥΝΤΟΝΙΣΜΟΥ (RESONANCE) ΥΠΟ ΕΠΙΚΑΛΥΨΙΝ ΤΟΥ 0,01 ΤΗΣ ΜΟΝΟΜΟΡΙΑΚΗΣ. ΤΟ ΣΗΜΕΙΟΝ ΤΗΞΕΩΣ ΤΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ ΟΥΣΙΩΝ ΠΑΡΕΤΗΡΗΘΗ ΕΚ ΤΗΣ ΜΕΤΑΒΟΛΗΣ ΤΗΣ ΕΝΤΑΣΕΩΣ ΤΩΝ ΤΑΙΝΙΩΝ RAMAN ΧΑΜΗΛΗΣ ΣΥΧΝΟΤΗΤΟΣ ΚΑΙ ΕΥΡΕΘΗ ΧΑΜΗΛΟΤΕΡΟΝ ΤΟΥ ΣΗΜΕΙΟΥ ΤΗΞΕΩΣ ΤΗΣ ΟΥΣΙΑΣ ΕΙΣ ΣΥΝΗΘΗ ΚΑΤΑΣΤΑΣΙΝ ΕΙΣ ΤΟ ΦΑΣΜΑ RAMAN ΜΕΡΙΚΩΝ ΠΡΟΣΡΟΦΗΜΕΝΩΝ ΟΥΣΙΩΝ ΜΕ TD ΣΥΜΜΕΤΡΙΑΝ ΜΕΡΙΚΑΙ ΤΑΙΝΙΑΙ ΑΙ ΟΠΟΙΑΙ ΟΦΕΙΛΟΝΤΑΙ ΕΙΣ ΕΚΦΥΛΙΣΜΕΝΑΣ ΤΑΛΑΝΤΩΣΕΙΣ, ΔΙΑΣΠΩΝΤΑΙ ΕΙΣ ΔΥΟ 'Η ΤΡΕΙΣ ΛΟΓΩ ΑΡΣΕΩΣ ΤΟΥ ΕΚΦΥΛΙΣΜΟΥ ΚΑΤΑ ΤΗΝ ΠΡΟΣΡΟΦΗΣΙΝ."],"dc:identifier":["10.12681/eadd/0810","http://hdl.handle.net/10442/hedi/0810"],"dc:language":["gre"],"dc:publisher":["Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)","National and Kapodistrian University of Athens"],"dc:subject":["ADSORBED MOLECULES","Adsorption","Laser raman spectroscopy","ΠΡΟΣΡΟΦΗΜΕΝΑ ΜΟΡΙΑ","Προσρόφηση","ΦΑΣΜΑΤΟΣΚΟΠΙΑ LASER-RAMAN","Φυσικές Επιστήμες","Natural Sciences","Χημεία","Chemical Sciences"],"dc:title":["LASER-RAMAN ΦΑΣΜΑΤΑ ΟΥΣΙΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ","LASER-RAMAN SPECTRA OF ADSORBED MOLECULES"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:27Z"}