3P069

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SEIRA Spectroscopy of Lanthanide-Diglycolamide Complexes on Gold Surface

Takumi Honda1, Daisuke Kajiya1, Masashi Kaneko2, Ken-ichi Saitow1, Takeharu Haino1, Takayuki Ebata1, and ○Yoshiya Inokuchi1

1 Department of Chemistry, Hiroshima University, Japan 2 Japan Atomic Energy Agency, Japan

�Abstract�We synthesize a thiol derivative of diglycolamide (DGA), and it is chemisorped on gold surface, which is prepared by vacuum deposition on a Si prism for the ATR IR measurement. We put a solution of lanthanide salts on the surface to form lanthanide-DGA complexes (Ln3+(DGA)3) and measure SEIRA spectra by an FT-IR spectrometer. We assign the SEIRA spectra with the aid of quantum chemical calculations. �£�y�tãę³�,·p�/.ĜRHQ¹�¯¤ÈÜĞÎÙÕğ "ĠĒ���

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.[2, 3]�Äêî�"ĠqĘ!Þ��há�/�.;8P9UQ2LBĞDGAğ� Ln3+35S!đ35S¨±!Ép��!ą�<I7AQ!ÿ×1 SEIRA qlÑ�ü���1Ă&�� �½Ñ (�ěTßă )�Ár ĠĐúø w��ç��.DGAČd�Ğ2-[(diethylcarbamoyl)methoxy]-N-methyl-N- (6-sulfanylhexyl)acetamideğ1ÂÌ~± +-ª��ATR ×��há�. SiGP=MW ĐúøĞ~7 nmğ1æïùç�Ġ�!W DGA Čd�! DMSO ÙÕ1Öu��ĠČd�1Đúø w��ç���ĞË¥�1� 1 ë�ğ�ýĚ1ÓÔ!©ĠLn3+35S1�'ÎÙÕ1Öu�� Ln3+(DGA)3đ35S1à±�����!đ35S!ą�<I7AQ1SEIRAql +-ª��ą�<I7AQ"ĠLn3+35S!ÂÛ +.ą�<I7AQ!�wĞ�<I7AQğ���ª��%�Ġđ35S +# DGAČd�!��ÊĈ�ßăą�<I7AQ1 OrcaĠGaussian 091á�āò���� Ġ

Fig. 1. DGA on Au surface.

ď � w � ā ò " DGA ! ð ó à ñ ċ q 1 @ A O N ? Q w � �2-[(dimethylcarbamoyl)methoxy]-N,N-dimethylacetamide ��ü��� �õÆT÷��� 2 ª,/� SEIRA�<I7AQ1ë��W���đ35S!ĠX���Čd�!�{ �®�.��/! Ln3+

35S �)Ġ1630 cm–1`ć ¾è�«q¨!i}�ÿ×�/Ġ�/"ĐúøW�Ln3+� DGAČd�!Ĕ�đ35S1¨±��.��1ý��.�~1630 cm–1!i}"ĠDGAČd�! C=Obö¶vĞ2LB Iğ� ��/.�W��!i}�eÒ»k ÿ×�/�.���,ĠLn3+�!đ35S¨± +- C=O bö¶v"eÒ»k :FA�.���0�.��! SEIRA �<I7AQ�,"đ35S! stoichiometry "Y¾�.�Ġas!êî�, Ln3+:DGA = 1:3!đ35S1¨±��.���ë��/�.[4]�� 3 ď�w�āò +-ª,/� Eu3+(DGA)3đ35S!ÊĈ1ë��DGA!6QJDQ�4U@Q!čó� Eu3+ Čd��.��! Eu3+(DGA)3 đ35S�DGA Čd�!ßăą�<I7AQ +-ª,/�ą��<I7AQ1Ġ�ě�ª,/�SEIRA �<I7AQ�m � 4 ë���SEIRA�<I7AQ�ª,/� 1630 cm–1`ć!«q¨!i}1Ġāò!<I7AQ"+�nÞ�� -Ġď�w�āòõÆ"�§�.�÷�,/.�Þ�Ġ1600 cm–1+-eÒ» pÞ��.«¦�i} ��)ď�w�āò!õÆ1á�ĀÅ1ĉ(� -Ġ�!ĀÅ +�� Ln3+35S� DGA!Ĕ!q�Ĕõ~ ĕ�.°�1ª.]��.� �z÷¼Ý� [1] M. Kaneko et al. Inorg. Chem. 54, 7103 (2015). [2] Y. Inokuchi et al. Chem. Phys. Lett. 592, 90 (2014). [3] Y. Inokuchi et al. New J. Chem. 39, 8673 (2015). [4] K. Shimojo et al. Anal. Sci. 30, 263 (2014).

Fig. 2. SEIRA spectra of the complexes.

Fig. 3. Eu3+(DGA)3 complex.

Fig. 4. Comparison of the SEIRA spectrum with the calculated spectrum of Eu3+(DGA)3.