| ²é¿´: 224 | »Ø¸´: 4 | |||
| µ±Ç°Ö÷ÌâÒѾ´æµµ¡£ | |||
| ±¾Ìû²úÉú 1 ¸ö ·ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴 | |||
zhchd2008½ð³æ (СÓÐÃûÆø)
|
[½»Á÷]
Çó·Òë
|
||
|
¸ßÊÖ°ïæ·ÒëÁË£¬ÒªÄÜͨ˳¡£Ð»Ð» Fluorescence properties of 2 and 4 The ligand-assisted photoluminescence properties of the lanthanide compounds 2 and 4 were examined at room temperature.When excited at 335 nm, 2 emits red light, while 4 shows green light emission upon excitation at 334 nm.The photoluminescence spectra are shown in Fig.4.The characteristic emission bands of 2 at 584, 598, 622,and 693 nm are assigned to 5D0 ¡ú 7FJ (J =0,1,2, and 4) transitions,while the emission peaks of 4 at 495, 548, 590,and 625 nm can be attributed to 5D4¡ú7FJ (J =6,5,4,and3) transitions,respectively.However,these characteristic emission bands indicate that the ligand-to-metal energy transfer is moderately efficient under the experimental conditions.It is noted that the forbidden transition 5D0 ¡ú 7F0 was also observed in the europium compound 2.Moreover,the preferred transition,5D0¡ú7F2 for europium-containing luminescent materials,is much more intense than the 5D0¡ú7F1 transition in 2.It is well-known that the 5D0¡ú7F2 transition induced by the electric dipole moment is hypersensitive to the environment of the Euion,while the 5D0¡ú7F1 transition is a magnetic dipole transition which is fairly insensitive to the coordination environment of the Euion.The intensity ratio I(5D0¡ú7F2)/I(5D0¡ú7F1) is equal to 3.57,which indicates that Eu3+ ions are not at an inversion center [12a].This is in agreement with the result of the single crystal X-ray diffraction. |
» ²ÂÄãϲ»¶
297Çóµ÷¼Á
ÒѾÓÐ12È˻ظ´
26µ÷¼Á 086003
ÒѾÓÐ3È˻ظ´
265Çóµ÷¼Á
ÒѾÓÐ20È˻ظ´
271·ÖÇóµ÷¼ÁѧУ
ÒѾÓÐ11È˻ظ´
320·ÖÈ˹¤ÖÇÄܵ÷¼Á
ÒѾÓÐ6È˻ظ´
Çóµ÷¼Á£¬Ò»Ö¾Ô¸ÄϾ©º½¿Õº½Ìì´óѧ £¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶
ÒѾÓÐ8È˻ظ´
280Çóµ÷¼Á
ÒѾÓÐ19È˻ظ´
Çó²ÄÁϵ÷¼Á£¬Ò»Ö¾Ô¸Ö£ÖÝ´óѧ289·Ö
ÒѾÓÐ15È˻ظ´
26¿¼Ñе÷¼Á0710 0860
ÒѾÓÐ6È˻ظ´
282Çóµ÷¼Á
ÒѾÓÐ22È˻ظ´
resonant
ľ³æ (ÕýʽдÊÖ)
¶À×ÔΪÕþ
- ·ÒëEPI: 1
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ¹ó±ö: 0.063
- ½ð±Ò: 3859.3
- Ìû×Ó: 594
- ÔÚÏß: 44.5Сʱ
- ³æºÅ: 113887
- ×¢²á: 2005-11-23
- רҵ: ¹âѧ

2Â¥2010-04-13 12:50:14
zhchd2008
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1344.9
- Ìû×Ó: 113
- ÔÚÏß: 13.1Сʱ
- ³æºÅ: 856185
- ×¢²á: 2009-09-25
3Â¥2010-04-13 12:58:53
resonant
ľ³æ (ÕýʽдÊÖ)
¶À×ÔΪÕþ
- ·ÒëEPI: 1
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ¹ó±ö: 0.063
- ½ð±Ò: 3859.3
- Ìû×Ó: 594
- ÔÚÏß: 44.5Сʱ
- ³æºÅ: 113887
- ×¢²á: 2005-11-23
- רҵ: ¹âѧ

4Â¥2010-04-13 13:16:29
kongxiangshi
½ð³æ (СÓÐÃûÆø)
- ·ÒëEPI: 2
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1255.5
- Ìû×Ó: 120
- ÔÚÏß: 18.8Сʱ
- ³æºÅ: 431935
- ×¢²á: 2007-08-12
- ÐÔ±ð: GG
- רҵ: ÉúÎï´ó·Ö×ӽṹÓ빦ÄÜ
zhchd2008(½ð±Ò+2, ·ÒëEPI+1): 2010-04-13 16:56
|
2ºÍ4µÄÓ«¹âÐÔÖÊ ÔÚÊÒÎÂϼì²âï绯Îï2ºÍ4µÄÅä»ù¸¨Öú¹âÖ·¢¹âÌØÐÔ¡£µ±¼¤·¢²¨³¤ÔÚ335£¬2·¢³öºì¹â£¬¶ø4ÏÔʾÁËÂÌÉ«µÄ¹â¼¤·¢¹â¹âÆ×ÔÚ334 nm¡£4ÏÔʾÂ̹ⷢÉ䡣ͼ4¸ø³öÁ˹âÖ·¢¹â¹âÆ×¡£·Ö±ðµØ£¬2µÄÌØÕ÷·¢Éä´øÎª584, 598, 622,ºÍ693 nm¿É±»·ÖÅäµ½5D0 ¡ú 7FJ (J =0,1,2, ºÍ4) ԾǨ£¬4µÄ·¢Éä·åÔÚ495, 548, 590,ºÍ625 nm´¦¿É¹éÒòÓÚ5D4¡ú7FJ (J =6,5,4,and3)ԾǨ¡£È»¶øÕâÐ©ÌØÕ÷·¢Éä´ø±íÃ÷ÔÚʵÑéÌõ¼þÏ£¬Åä»ùµ½½ðÊôµÄÄÜÁ¿×ªÒÆÊÇκÍÓÐЧÂʵġ£Ó¦µ±×¢Ò⣬ÔÚîð»¯Îï2ÖÐÒ²¹Û²ìµ½Á˽ûÖ¹µÄ5D0 ¡ú 7F0 ԾǨ¡£¸üÓÐÉõÕߣ¬ÔÚ2ÖУ¬¶ÔÓÚº¬îð·¢¹âÎïÖÊ£¬¿ÉÑ¡µÄԾǨ5D0¡ú7F2 ´¦±È5D0¡ú7F1 Ç¿ÁҵĶࡣÖÚËùÖÜÖª£¬±»µçż¼«¾ØÓÕµ¼µÄ5D0¡ú7F2 ԾǨ¶ÔEuion»·¾³³¬Ãô¸Ð£¬È»¶ø£¬5D0¡ú7F1 ԾǨÊÇÒ»ÖÖ´Åż¼«Ô¾Ç¨£¬¶ÔEuionµÄе÷»·¾³Ï൱²»Ãô¸Ð¡£I(5D0¡ú7F2)/I(5D0¡ú7F1) µÄÇ¿¶È±ÈÂÊÊÇ3.57£¬±íÃ÷Eu3+ÑôÀë×Ó²»ÔÚ·´ÉìÖÐÐÄ¡£ÕâÓëµ¥¾§X -ÉäÏßÑÜÉä½á¹ûÒ»Ö¡£ |
5Â¥2010-04-13 16:31:34














»Ø¸´´ËÂ¥