440
H. Kobayashi
the power index of ϕ(t) is population to -t 2 . The green line in this same figure depicts
a Lorentzian function in which ϕ(t) showing an exponential manner, while the cyan
curve is for the case intermediate between Gaussian and Lorentzian observed in 1D
spin diffusion systems.
12.3 Experimental Procedure
12.3.1 Sample Preparation and Notation
For the investigation of the molecular orientations and dynamics of organic radicals
in 1D nanochannels, the appropriate spacer molecules for the dilution of radicals
included in TPP or CLPOT nanochannels were selected. The resulting material
comprised needle-like crystallites and was colorless. For the construction of 1D
organic radical chains in 1D nanochannels, a solution of the radical species was
prepared having an excess concentration and without the spacer species. The
resulting material comprised needle-like crystallites and was pale orange or pale
pink. The reader is referred to several papers that provide detailed preparation
process of 1D OIC-OR [27, 39, 41, 44, 52]. Most of 1D OIC-ORs prepared in this
way were stable for at least a year in air.
In this chapter, the notation [(A) 2 −(B) x /(C) y ] is used for 1D OIC-OR. For example, when TPP, 4-X-TEMPO, and 4-R-TEMP are used to as host, guest, and spacer,
respectively, the notation becomes [(TPP) 2 -(4-X-TEMPO) x /(4-R-TEMP) y ]. x and y
denote the numbers of incorporated units per two host molecules. Throughout the
text, the sample names may also be abbreviated simply as “1a/B/C” or “1b/C.” Note
that the host to guest ratio notation for each sample has been abbreviated for the sake
of simplifying the figure or in the case of focusing only the component materials of
1D OIC-OR (e.g., the notation of [(TPP)-(4-X-TEMPO)/(4-R-TEMP)] is used for
[(TPP) 2 -(4-X-TEMPO) x /(4-R-TEMP) y ]).
12.3.2 Sample Characterization
The structures of TPP and CLPOT nanochannels are known to be maintained
even after the inclusion of guest radicals. In addition, the space group and
cell parameters of CLPOT crystals are similar following inclusion. However,
following inclusion, the cell parameters and pore diameters of TPP crystal can
be expanded according to the molecular cross section of the guest radical. Figure
12.4 presents the room temperature powder X-ray diffraction (XRD) patterns
obtained for guest-free TPP, [(TPP) 2 -(PhIN) 0.002 /(N-PhMI) 1.0 ] (1a/2h/3e) [44],
[(TPP) 2 -(PhNN) x /(PhIN) y /(N-PhMI) 1.0 ] (x ≈ 5 × 10 −4 and y ≈ 2 × 10 −4 ;
(1a/2f/2h/3e) [44], [(TPP) 2 -(DTBN) x /(pivalone) 1.1 ] (x ≈ 4 × 10 −4 ; 1a/2e/3d)
[41], [(TPP) 2 -(TEMPONE) 0.021 /(TEMP) 1.1 ] (1a/2b/3a) [41], and [(TPP) 2 -
(TEMPOL) 0.004 /(TEMP) 1.2 ] (1a/2c/3a) [43]. In Figs. 12.4a–f, the reflection patterns
H. Kobayashi
the power index of ϕ(t) is population to -t 2 . The green line in this same figure depicts
a Lorentzian function in which ϕ(t) showing an exponential manner, while the cyan
curve is for the case intermediate between Gaussian and Lorentzian observed in 1D
spin diffusion systems.
12.3 Experimental Procedure
12.3.1 Sample Preparation and Notation
For the investigation of the molecular orientations and dynamics of organic radicals
in 1D nanochannels, the appropriate spacer molecules for the dilution of radicals
included in TPP or CLPOT nanochannels were selected. The resulting material
comprised needle-like crystallites and was colorless. For the construction of 1D
organic radical chains in 1D nanochannels, a solution of the radical species was
prepared having an excess concentration and without the spacer species. The
resulting material comprised needle-like crystallites and was pale orange or pale
pink. The reader is referred to several papers that provide detailed preparation
process of 1D OIC-OR [27, 39, 41, 44, 52]. Most of 1D OIC-ORs prepared in this
way were stable for at least a year in air.
In this chapter, the notation [(A) 2 −(B) x /(C) y ] is used for 1D OIC-OR. For example, when TPP, 4-X-TEMPO, and 4-R-TEMP are used to as host, guest, and spacer,
respectively, the notation becomes [(TPP) 2 -(4-X-TEMPO) x /(4-R-TEMP) y ]. x and y
denote the numbers of incorporated units per two host molecules. Throughout the
text, the sample names may also be abbreviated simply as “1a/B/C” or “1b/C.” Note
that the host to guest ratio notation for each sample has been abbreviated for the sake
of simplifying the figure or in the case of focusing only the component materials of
1D OIC-OR (e.g., the notation of [(TPP)-(4-X-TEMPO)/(4-R-TEMP)] is used for
[(TPP) 2 -(4-X-TEMPO) x /(4-R-TEMP) y ]).
12.3.2 Sample Characterization
The structures of TPP and CLPOT nanochannels are known to be maintained
even after the inclusion of guest radicals. In addition, the space group and
cell parameters of CLPOT crystals are similar following inclusion. However,
following inclusion, the cell parameters and pore diameters of TPP crystal can
be expanded according to the molecular cross section of the guest radical. Figure
12.4 presents the room temperature powder X-ray diffraction (XRD) patterns
obtained for guest-free TPP, [(TPP) 2 -(PhIN) 0.002 /(N-PhMI) 1.0 ] (1a/2h/3e) [44],
[(TPP) 2 -(PhNN) x /(PhIN) y /(N-PhMI) 1.0 ] (x ≈ 5 × 10 −4 and y ≈ 2 × 10 −4 ;
(1a/2f/2h/3e) [44], [(TPP) 2 -(DTBN) x /(pivalone) 1.1 ] (x ≈ 4 × 10 −4 ; 1a/2e/3d)
[41], [(TPP) 2 -(TEMPONE) 0.021 /(TEMP) 1.1 ] (1a/2b/3a) [41], and [(TPP) 2 -
(TEMPOL) 0.004 /(TEMP) 1.2 ] (1a/2c/3a) [43]. In Figs. 12.4a–f, the reflection patterns