""O  ~  .....  (’D  =  .....  t  "e  - ....  (’)  ~  .....  ....  0  =  ""O  =  O"  - ....  (’)  ~  .....  ....  0  =  rJJ  (’D  ’?  ....  ~\,Ci  N  0  ....  \,Ci  rJJ  =› (’D  (’D  .....  N  \,Ci  0  ....  0  O’I  c  rJJ  N  0  ....  \,Ci  --- 0  N  QO  -....J  O’I  \,Ci  ....  >  ....  FIG. 29  1\1  (.!,~  OS  OJ  ~  0.6  j  O.S  S  OA  ..Q  <(  0.3  0.2  0.1  0.0  \  Zr(JV}~HOPO in HCI  ••••lrHOf>O HCi  v.~?l!  ,,,,zrHOPO  HCi lM  .... zrHOPO  HO  2M  •••• Z!’HOPO HCi 3M  •••ZrHOPO  HG 4M  ..-ZfHOPO HCJ SM  l\:O?OHCl6M  .........................  ’.:•••,:•••••••,  2:40  260  2:SO  300  :.ti!J  .:M-0  3GO  ........................................................ wavelength_{nm)_••••••••••••••••••••••••••••••••••••••••  [Zrj"’ [Hgandi "’25 ufv\  T  "’RT. f’ath  if:’.,,gth"’  10  mm  e  l).S  I::  ti>  ,f  (Ul  ~  ~  i).s  Zr$^{4}$+-HOPO complex, pH 3 to 11  C.{~mpleK  with 3,4,3•U{1,2>f.{OP0}  more s:!»h!e  ~:-~•-- .......  .•  ~1<  ,.,..,.  <t ❖  ~:-::.  ~:$-,"~ ~;-:~  3  4  s  6  1  s  9  10  :u  ;-.ty,.1r,:.,:::.(d,::~  m-;:.r-;z  :;t~ZJ2  .12  B 